1545121 has 2 divisors, whose sum is σ = 1545122. Its totient is φ = 1545120.

The previous prime is 1545107. The next prime is 1545127. The reversal of 1545121 is 1215451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1535121 + 10000 = 1239^2 + 100^2 .

It is an emirp because it is prime and its reverse (1215451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1545121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1545127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772560 + 772561.

It is an arithmetic number, because the mean of its divisors is an integer number (772561).

2^1545121 is an apocalyptic number.

It is an amenable number.

1545121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545121 is an equidigital number, since it uses as much as digits as its factorization.

1545121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200, while the sum is 19.

The square root of 1545121 is about 1243.0289618508. The cubic root of 1545121 is about 115.6078962770.

The spelling of 1545121 in words is "one million, five hundred forty-five thousand, one hundred twenty-one".