42102664 has 32 divisors (see below), whose sum is σ = 82215000. Its totient is φ = 20188672.

The previous prime is 42102661. The next prime is 42102691. The reversal of 42102664 is 46620124.

It can be written as a sum of positive squares in 4 ways, for example, as 41705764 + 396900 = 6458^2 + 630^2 .

It is not an unprimeable number, because it can be changed into a prime (42102661) 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 in 7 ways as a sum of consecutive naturals, for example, 39612 + ... + 40660.

Almost surely, 2^42102664 is an apocalyptic number.

It is an amenable number.

42102664 is a deficient number, since it is larger than the sum of its proper divisors (40112336).

42102664 is a wasteful number, since it uses less digits than its factorization.

42102664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 42102664 is about 6488.6565635731. The cubic root of 42102664 is about 347.8856584761.

Adding to 42102664 its reverse (46620124), we get a palindrome (88722788).

The spelling of 42102664 in words is "forty-two million, one hundred two thousand, six hundred sixty-four".