1420981 has 2 divisors, whose sum is σ = 1420982. Its totient is φ = 1420980.

The previous prime is 1420967. The next prime is 1420999. The reversal of 1420981 is 1890241.

It is a happy number.

1420981 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1418481 + 2500 = 1191^2 + 50^2 .

It is an emirp because it is prime and its reverse (1890241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420981 - 2⁵ = 1420949 is a prime.

It is a super-2 number, since 2×1420981² = 4038374004722, which contains 22 as substring.

1420981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710490 + 710491.

It is an arithmetic number, because the mean of its divisors is an integer number (710491).

2^1420981 is an apocalyptic number.

It is an amenable number.

1420981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420981 is an equidigital number, since it uses as much as digits as its factorization.

1420981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1420981 is about 1192.0490761709. The cubic root of 1420981 is about 112.4249639548.

It can be divided in two parts, 1420 and 981, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1420981 in words is "one million, four hundred twenty thousand, nine hundred eighty-one".