1145842731 has 24 divisors (see below), whose sum is σ = 1806720240. Its totient is φ = 694008000.

The previous prime is 1145842697. The next prime is 1145842787. The reversal of 1145842731 is 1372485411.

1145842731 is a `hidden beast` number, since 1 + 1 + 4 + 584 + 2 + 73 + 1 = 666.

It is not a de Polignac number, because 1145842731 - 2⁹ = 1145842219 is a prime.

It is a super-2 number, since 2×1145842731² = 2625911128371076722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145842231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222081 + ... + 227181.

It is an arithmetic number, because the mean of its divisors is an integer number (75280010).

Almost surely, 2^1145842731 is an apocalyptic number.

1145842731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1145842731 is a deficient number, since it is larger than the sum of its proper divisors (660877509).

1145842731 is a wasteful number, since it uses less digits than its factorization.

1145842731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387 (or 7384 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1145842731 is about 33850.2988317681. The cubic root of 1145842731 is about 1046.4255571422.

The spelling of 1145842731 in words is "one billion, one hundred forty-five million, eight hundred forty-two thousand, seven hundred thirty-one".