42661560 has 32 divisors (see below), whose sum is σ = 127985040. Its totient is φ = 11376384.

The previous prime is 42661537. The next prime is 42661589. The reversal of 42661560 is 6516624.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177637 + ... + 177876.

Almost surely, 2^42661560 is an apocalyptic number.

42661560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42661560 is an abundant number, since it is smaller than the sum of its proper divisors (85323480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42661560 is a wasteful number, since it uses less digits than its factorization.

42661560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355527 (or 355523 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 42661560 is about 6531.5817379866. The cubic root of 42661560 is about 349.4182444500.

The spelling of 42661560 in words is "forty-two million, six hundred sixty-one thousand, five hundred sixty".