1142555931 has 36 divisors (see below), whose sum is σ = 1828106280. Its totient is φ = 687086400.

The previous prime is 1142555929. The next prime is 1142555957. The reversal of 1142555931 is 1395552411.

It is a happy number.

1142555931 is a `hidden beast` number, since 1 + 14 + 2 + 55 + 593 + 1 = 666.

It is not a de Polignac number, because 1142555931 - 2¹ = 1142555929 is a prime.

It is a super-2 number, since 2×1142555931² = 2610868110926553522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142555971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 138655 + ... + 146663.

It is an arithmetic number, because the mean of its divisors is an integer number (50780730).

Almost surely, 2^1142555931 is an apocalyptic number.

1142555931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1142555931 is a deficient number, since it is larger than the sum of its proper divisors (685550349).

1142555931 is a wasteful number, since it uses less digits than its factorization.

1142555931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168 (or 8154 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 1142555931 is about 33801.7149121165. The cubic root of 1142555931 is about 1045.4240568896.

The spelling of 1142555931 in words is "one billion, one hundred forty-two million, five hundred fifty-five thousand, nine hundred thirty-one".