103457021 has 2 divisors, whose sum is σ = 103457022. Its totient is φ = 103457020.

The previous prime is 103457017. The next prime is 103457047. The reversal of 103457021 is 120754301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 3556996 = 9995^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 103457021 - 2² = 103457017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103457521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51728510 + 51728511.

It is an arithmetic number, because the mean of its divisors is an integer number (51728511).

Almost surely, 2^103457021 is an apocalyptic number.

It is an amenable number.

103457021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103457021 is an equidigital number, since it uses as much as digits as its factorization.

103457021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 103457021 is about 10171.3824527446. The cubic root of 103457021 is about 469.4470954083.

The spelling of 103457021 in words is "one hundred three million, four hundred fifty-seven thousand, twenty-one".