1325242857 has 16 divisors (see below), whose sum is σ = 1774952640. Its totient is φ = 879524352.

The previous prime is 1325242847. The next prime is 1325242883. The reversal of 1325242857 is 7582425231.

It is not a de Polignac number, because 1325242857 - 2⁷ = 1325242729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325242847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110253 + ... + 1111445.

It is an arithmetic number, because the mean of its divisors is an integer number (110934540).

Almost surely, 2^1325242857 is an apocalyptic number.

It is an amenable number.

1325242857 is a deficient number, since it is larger than the sum of its proper divisors (449709783).

1325242857 is a wasteful number, since it uses less digits than its factorization.

1325242857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552.

The product of its digits is 134400, while the sum is 39.

The square root of 1325242857 is about 36403.8851910067. The cubic root of 1325242857 is about 1098.4117179877.

The spelling of 1325242857 in words is "one billion, three hundred twenty-five million, two hundred forty-two thousand, eight hundred fifty-seven".