1199534157 has 32 divisors (see below), whose sum is σ = 1859362560. Its totient is φ = 762854400.

The previous prime is 1199534143. The next prime is 1199534159. The reversal of 1199534157 is 7514359911.

1199534157 is a `hidden beast` number, since 11 + 99 + 534 + 15 + 7 = 666.

It is not a de Polignac number, because 1199534157 - 2¹⁰ = 1199533133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199534159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246613 + ... + 251429.

It is an arithmetic number, because the mean of its divisors is an integer number (58105080).

Almost surely, 2^1199534157 is an apocalyptic number.

It is an amenable number.

1199534157 is a deficient number, since it is larger than the sum of its proper divisors (659828403).

1199534157 is a wasteful number, since it uses less digits than its factorization.

1199534157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250 (or 5244 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The square root of 1199534157 is about 34634.2916341593. The cubic root of 1199534157 is about 1062.5210424806.

The spelling of 1199534157 in words is "one billion, one hundred ninety-nine million, five hundred thirty-four thousand, one hundred fifty-seven".