1195213257 has 24 divisors (see below), whose sum is σ = 2026380096. Its totient is φ = 664518816.

The previous prime is 1195213241. The next prime is 1195213289. The reversal of 1195213257 is 7523125911.

1195213257 is a `hidden beast` number, since 1 + 195 + 213 + 257 = 666.

It is not a de Polignac number, because 1195213257 - 2⁴ = 1195213241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1195213157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254043 + ... + 258704.

It is an arithmetic number, because the mean of its divisors is an integer number (84432504).

Almost surely, 2^1195213257 is an apocalyptic number.

It is an amenable number.

1195213257 is a deficient number, since it is larger than the sum of its proper divisors (831166839).

1195213257 is a wasteful number, since it uses less digits than its factorization.

1195213257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512797 (or 512794 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 1195213257 is about 34571.8564297609. The cubic root of 1195213257 is about 1061.2437214061.

The spelling of 1195213257 in words is "one billion, one hundred ninety-five million, two hundred thirteen thousand, two hundred fifty-seven".