1138921575 has 72 divisors (see below), whose sum is σ = 2120937168. Its totient is φ = 538560000.

The previous prime is 1138921559. The next prime is 1138921583. The reversal of 1138921575 is 5751298311.

It is not a de Polignac number, because 1138921575 - 2⁴ = 1138921559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 370545 + ... + 373605.

Almost surely, 2^1138921575 is an apocalyptic number.

1138921575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1138921575 is a deficient number, since it is larger than the sum of its proper divisors (982015593).

1138921575 is a wasteful number, since it uses less digits than its factorization.

1138921575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137 (or 3121 counting only the distinct ones).

The product of its digits is 75600, while the sum is 42.

The square root of 1138921575 is about 33747.9121576432. The cubic root of 1138921575 is about 1044.3144164265.

The spelling of 1138921575 in words is "one billion, one hundred thirty-eight million, nine hundred twenty-one thousand, five hundred seventy-five".