142886731 has 16 divisors (see below), whose sum is σ = 157338720. Its totient is φ = 128954880.

The previous prime is 142886713. The next prime is 142886749. The reversal of 142886731 is 137688241.

It is an interprime number because it is at equal distance from previous prime (142886713) and next prime (142886749).

It is a cyclic number.

It is not a de Polignac number, because 142886731 - 2¹¹ = 142884683 is a prime.

It is a super-2 number, since 2×142886731² = 40833235791732722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142886701) 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 15 ways as a sum of consecutive naturals, for example, 184461 + ... + 185233.

It is an arithmetic number, because the mean of its divisors is an integer number (9833670).

Almost surely, 2^142886731 is an apocalyptic number.

142886731 is a deficient number, since it is larger than the sum of its proper divisors (14451989).

142886731 is a wasteful number, since it uses less digits than its factorization.

142886731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its digits is 64512, while the sum is 40.

The square root of 142886731 is about 11953.5237900796. The cubic root of 142886731 is about 522.7940467700.

The spelling of 142886731 in words is "one hundred forty-two million, eight hundred eighty-six thousand, seven hundred thirty-one".