42646529 has 2 divisors, whose sum is σ = 42646530. Its totient is φ = 42646528.

The previous prime is 42646517. The next prime is 42646537. The reversal of 42646529 is 92564624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 14077504 = 5345^2 + 3752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42646529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42646492 and 42646501.

It is not a weakly prime, because it can be changed into another prime (42646589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323264 + 21323265.

It is an arithmetic number, because the mean of its divisors is an integer number (21323265).

Almost surely, 2^42646529 is an apocalyptic number.

It is an amenable number.

42646529 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646529 is an equidigital number, since it uses as much as digits as its factorization.

42646529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 42646529 is about 6530.4309964963. The cubic root of 42646529 is about 349.3772026427.

The spelling of 42646529 in words is "forty-two million, six hundred forty-six thousand, five hundred twenty-nine".