1000156970 has 16 divisors (see below), whose sum is σ = 1800855720. Its totient is φ = 399935424.

The previous prime is 1000156943. The next prime is 1000156981. The reversal of 1000156970 is 796510001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 896463481 + 103693489 = 29941^2 + 10183^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21176 + ... + 49484.

Almost surely, 2^1000156970 is an apocalyptic number.

1000156970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000156970 is a deficient number, since it is larger than the sum of its proper divisors (800698750).

1000156970 is a wasteful number, since it uses less digits than its factorization.

1000156970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31849.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1000156970 is about 31625.2584179165. The cubic root of 1000156970 is about 1000.0523205958.

Adding to 1000156970 its reverse (796510001), we get a palindrome (1796666971).

The spelling of 1000156970 in words is "one billion, one hundred fifty-six thousand, nine hundred seventy".