42505770 has 16 divisors (see below), whose sum is σ = 102013920. Its totient is φ = 11334864.

The previous prime is 42505759. The next prime is 42505781. The reversal of 42505770 is 7750524.

It is an interprime number because it is at equal distance from previous prime (42505759) and next prime (42505781).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1416859 = 42505770 / (4 + 2 + 5 + 0 + 5 + 7 + 7 + 0).

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, 708400 + ... + 708459.

It is an arithmetic number, because the mean of its divisors is an integer number (6375870).

Almost surely, 2^42505770 is an apocalyptic number.

42505770 is an abundant number, since it is smaller than the sum of its proper divisors (59508150).

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

42505770 is a wasteful number, since it uses less digits than its factorization.

42505770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416869.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 42505770 is about 6519.6449289819. The cubic root of 42505770 is about 348.9923945327.

The spelling of 42505770 in words is "forty-two million, five hundred five thousand, seven hundred seventy".