42513780 has 24 divisors (see below), whose sum is σ = 119038752. Its totient is φ = 11336992.

The previous prime is 42513769. The next prime is 42513781. The reversal of 42513780 is 8731524.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42513781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354222 + ... + 354341.

It is an arithmetic number, because the mean of its divisors is an integer number (4959948).

Almost surely, 2^42513780 is an apocalyptic number.

It is an amenable number.

42513780 is an abundant number, since it is smaller than the sum of its proper divisors (76524972).

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

42513780 is a wasteful number, since it uses less digits than its factorization.

42513780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708575 (or 708573 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 42513780 is about 6520.2591973019. The cubic root of 42513780 is about 349.0143151136.

The spelling of 42513780 in words is "forty-two million, five hundred thirteen thousand, seven hundred eighty".