1000156975 has 12 divisors (see below), whose sum is σ = 1244680504. Its totient is φ = 797231520.

The previous prime is 1000156943. The next prime is 1000156981. The reversal of 1000156975 is 5796510001.

It is not a de Polignac number, because 1000156975 - 2⁵ = 1000156943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000156975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65289 + ... + 79138.

Almost surely, 2^1000156975 is an apocalyptic number.

1000156975 is a deficient number, since it is larger than the sum of its proper divisors (244523529).

1000156975 is a wasteful number, since it uses less digits than its factorization.

1000156975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144714 (or 144709 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 1000156975 is about 31625.2584969673. The cubic root of 1000156975 is about 1000.0523222623.

Adding to 1000156975 its reverse (5796510001), we get a palindrome (6796666976).

The spelling of 1000156975 in words is "one billion, one hundred fifty-six thousand, nine hundred seventy-five".