142164731 has 4 divisors (see below), whose sum is σ = 142195872. Its totient is φ = 142133592.

The previous prime is 142164721. The next prime is 142164733. The reversal of 142164731 is 137461241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137461241 = 1543 ⋅89087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142164731 is a prime.

It is a super-2 number, since 2×142164731² = 40421621480604722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142164694 and 142164703.

It is not an unprimeable number, because it can be changed into a prime (142164733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7235 + ... + 18348.

It is an arithmetic number, because the mean of its divisors is an integer number (35548968).

Almost surely, 2^142164731 is an apocalyptic number.

142164731 is a deficient number, since it is larger than the sum of its proper divisors (31141).

142164731 is an equidigital number, since it uses as much as digits as its factorization.

142164731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31140.

The product of its digits is 4032, while the sum is 29.

The square root of 142164731 is about 11923.2852435895. The cubic root of 142164731 is about 521.9120081373.

The spelling of 142164731 in words is "one hundred forty-two million, one hundred sixty-four thousand, seven hundred thirty-one".