1975712257 has 4 divisors (see below), whose sum is σ = 2017748736. Its totient is φ = 1933675780.

The previous prime is 1975712251. The next prime is 1975712269. The reversal of 1975712257 is 7522175791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1975712257 - 2⁷ = 1975712129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1975712251) 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, 21018169 + ... + 21018262.

It is an arithmetic number, because the mean of its divisors is an integer number (504437184).

Almost surely, 2^1975712257 is an apocalyptic number.

It is an amenable number.

1975712257 is a deficient number, since it is larger than the sum of its proper divisors (42036479).

1975712257 is an equidigital number, since it uses as much as digits as its factorization.

1975712257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42036478.

The product of its digits is 308700, while the sum is 46.

The square root of 1975712257 is about 44448.9848815471. The cubic root of 1975712257 is about 1254.8001580178.

The spelling of 1975712257 in words is "one billion, nine hundred seventy-five million, seven hundred twelve thousand, two hundred fifty-seven".