2001256975 has 6 divisors (see below), whose sum is σ = 2481558680. Its totient is φ = 1601005560.

The previous prime is 2001256963. The next prime is 2001257021. The reversal of 2001256975 is 5796521002.

It is a de Polignac number, because none of the positive numbers 2^k-2001256975 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40025115 + ... + 40025164.

Almost surely, 2^2001256975 is an apocalyptic number.

2001256975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2001256975 is a deficient number, since it is larger than the sum of its proper divisors (480301705).

2001256975 is an equidigital number, since it uses as much as digits as its factorization.

2001256975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80050289 (or 80050284 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 2001256975 is about 44735.4107503217. The cubic root of 2001256975 is about 1260.1849428284.

Adding to 2001256975 its reverse (5796521002), we get a palindrome (7797777977).

The spelling of 2001256975 in words is "two billion, one million, two hundred fifty-six thousand, nine hundred seventy-five".