1170138921 has 16 divisors (see below), whose sum is σ = 1876915200. Its totient is φ = 633458448.

The previous prime is 1170138911. The next prime is 1170138923. The reversal of 1170138921 is 1298310711.

It is not a de Polignac number, because 1170138921 - 2⁷ = 1170138793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1170138923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465941 + ... + 1466738.

It is an arithmetic number, because the mean of its divisors is an integer number (117307200).

Almost surely, 2^1170138921 is an apocalyptic number.

It is an amenable number.

1170138921 is a deficient number, since it is larger than the sum of its proper divisors (706776279).

1170138921 is a wasteful number, since it uses less digits than its factorization.

1170138921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932708.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 1170138921 is about 34207.2933889836. The cubic root of 1170138921 is about 1053.7699465020.

The spelling of 1170138921 in words is "one billion, one hundred seventy million, one hundred thirty-eight thousand, nine hundred twenty-one".