102457121 has 4 divisors (see below), whose sum is σ = 110338452. Its totient is φ = 94575792.

The previous prime is 102457097. The next prime is 102457129. The reversal of 102457121 is 121754201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46730896 + 55726225 = 6836^2 + 7465^2 .

It is a cyclic number.

It is not a de Polignac number, because 102457121 - 2¹⁰ = 102456097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102457129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3940646 + ... + 3940671.

It is an arithmetic number, because the mean of its divisors is an integer number (27584613).

Almost surely, 2^102457121 is an apocalyptic number.

It is an amenable number.

102457121 is a deficient number, since it is larger than the sum of its proper divisors (7881331).

102457121 is an equidigital number, since it uses as much as digits as its factorization.

102457121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7881330.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 102457121 is about 10122.1105012739. The cubic root of 102457121 is about 467.9298129945.

It can be divided in two parts, 1024 and 57121, that multiplied together give a square (58491904 = 7648²).

The spelling of 102457121 in words is "one hundred two million, four hundred fifty-seven thousand, one hundred twenty-one".