1000156506 has 16 divisors (see below), whose sum is σ = 2000905824. Its totient is φ = 333286704.

The previous prime is 1000156489. The next prime is 1000156517. The reversal of 1000156506 is 6056510001.

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, 1021 + ... + 44736.

It is an arithmetic number, because the mean of its divisors is an integer number (125056614).

Almost surely, 2^1000156506 is an apocalyptic number.

1000156506 is an abundant number, since it is smaller than the sum of its proper divisors (1000749318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000156506 is a wasteful number, since it uses less digits than its factorization.

1000156506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49405.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1000156506 is about 31625.2510820072. The cubic root of 1000156506 is about 1000.0521659453.

Adding to 1000156506 its reverse (6056510001), we get a palindrome (7056666507).

The spelling of 1000156506 in words is "one billion, one hundred fifty-six thousand, five hundred six".