1156197100 has 18 divisors (see below), whose sum is σ = 2508947924. Its totient is φ = 462478800.

The previous prime is 1156197083. The next prime is 1156197103. The reversal of 1156197100 is 17916511.

It is not an unprimeable number, because it can be changed into a prime (1156197103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5780886 + ... + 5781085.

Almost surely, 2^1156197100 is an apocalyptic number.

1156197100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156197100 is an abundant number, since it is smaller than the sum of its proper divisors (1352750824).

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

1156197100 is a wasteful number, since it uses less digits than its factorization.

1156197100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11561985 (or 11561978 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 31.

The square root of 1156197100 is about 34002.8984058712. The cubic root of 1156197100 is about 1049.5681065775.

The spelling of 1156197100 in words is "one billion, one hundred fifty-six million, one hundred ninety-seven thousand, one hundred".