1161572870 has 16 divisors (see below), whose sum is σ = 2094996960. Its totient is φ = 463703424.

The previous prime is 1161572869. The next prime is 1161572879. The reversal of 1161572870 is 782751611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161572879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110435 + ... + 120494.

It is an arithmetic number, because the mean of its divisors is an integer number (130937310).

Almost surely, 2^1161572870 is an apocalyptic number.

1161572870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161572870 is a deficient number, since it is larger than the sum of its proper divisors (933424090).

1161572870 is a wasteful number, since it uses less digits than its factorization.

1161572870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231439.

The product of its (nonzero) digits is 23520, while the sum is 38.

The square root of 1161572870 is about 34081.8554365809. The cubic root of 1161572870 is about 1051.1922571888.

The spelling of 1161572870 in words is "one billion, one hundred sixty-one million, five hundred seventy-two thousand, eight hundred seventy".