42646537 has 2 divisors, whose sum is σ = 42646538. Its totient is φ = 42646536.

The previous prime is 42646529. The next prime is 42646553. The reversal of 42646537 is 73564624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36614601 + 6031936 = 6051^2 + 2456^2 .

It is a cyclic number.

It is not a de Polignac number, because 42646537 - 2³ = 42646529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42646496 and 42646505.

It is not a weakly prime, because it can be changed into another prime (42646517) 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 as a sum of consecutive naturals, namely, 21323268 + 21323269.

It is an arithmetic number, because the mean of its divisors is an integer number (21323269).

Almost surely, 2^42646537 is an apocalyptic number.

It is an amenable number.

42646537 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646537 is an equidigital number, since it uses as much as digits as its factorization.

42646537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 37.

The square root of 42646537 is about 6530.4316090133. The cubic root of 42646537 is about 349.3772244891.

It can be divided in two parts, 4264653 and 7, that added together give a triangular number (4264660 = T₂₉₂₀).

The spelling of 42646537 in words is "forty-two million, six hundred forty-six thousand, five hundred thirty-seven".