64142761 has 2 divisors, whose sum is σ = 64142762. Its totient is φ = 64142760.

The previous prime is 64142753. The next prime is 64142797. The reversal of 64142761 is 16724146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40717161 + 23425600 = 6381^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 64142761 - 2³ = 64142753 is a prime.

It is a super-2 number, since 2×64142761² = 8228587577406242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64142711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071380 + 32071381.

It is an arithmetic number, because the mean of its divisors is an integer number (32071381).

Almost surely, 2^64142761 is an apocalyptic number.

It is an amenable number.

64142761 is a deficient number, since it is larger than the sum of its proper divisors (1).

64142761 is an equidigital number, since it uses as much as digits as its factorization.

64142761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 64142761 is about 8008.9175922842. The cubic root of 64142761 is about 400.2971978789.

The spelling of 64142761 in words is "sixty-four million, one hundred forty-two thousand, seven hundred sixty-one".