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1214981 is a prime number
BaseRepresentation
bin100101000101000000101
32021201122022
410220220011
5302334411
642012525
713220135
oct4505005
92251568
101214981
1175a919
124a7145
13337031
14238ac5
1518eedb
hex128a05

1214981 has 2 divisors, whose sum is σ = 1214982. Its totient is φ = 1214980.

The previous prime is 1214977. The next prime is 1215017. The reversal of 1214981 is 1894121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 312481 = 950^2 + 559^2 .

It is an emirp because it is prime and its reverse (1894121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214981 - 22 = 1214977 is a prime.

It is a super-2 number, since 2×12149812 = 2952357660722, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1214981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607490 + 607491.

It is an arithmetic number, because the mean of its divisors is an integer number (607491).

21214981 is an apocalyptic number.

It is an amenable number.

1214981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214981 is an equidigital number, since it uses as much as digits as its factorization.

1214981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 1214981 is about 1102.2617656437. The cubic root of 1214981 is about 106.7062429098.

The spelling of 1214981 in words is "one million, two hundred fourteen thousand, nine hundred eighty-one".