142631761 has 2 divisors, whose sum is σ = 142631762. Its totient is φ = 142631760.

The previous prime is 142631759. The next prime is 142631767. The reversal of 142631761 is 167136241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135582736 + 7049025 = 11644^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 142631761 - 2¹ = 142631759 is a prime.

It is a super-2 number, since 2×142631761² = 40687638491922242, which contains 22 as substring.

Together with 142631759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142631767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71315880 + 71315881.

It is an arithmetic number, because the mean of its divisors is an integer number (71315881).

Almost surely, 2^142631761 is an apocalyptic number.

It is an amenable number.

142631761 is a deficient number, since it is larger than the sum of its proper divisors (1).

142631761 is an equidigital number, since it uses as much as digits as its factorization.

142631761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 142631761 is about 11942.8539721459. The cubic root of 142631761 is about 522.4829001676.

The spelling of 142631761 in words is "one hundred forty-two million, six hundred thirty-one thousand, seven hundred sixty-one".