42915540 has 24 divisors (see below), whose sum is σ = 120163680. Its totient is φ = 11444128.

The previous prime is 42915503. The next prime is 42915541. The reversal of 42915540 is 4551924.

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

It is a junction number, because it is equal to n+sod(n) for n = 42915498 and 42915507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42915541) 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, 357570 + ... + 357689.

It is an arithmetic number, because the mean of its divisors is an integer number (5006820).

Almost surely, 2^42915540 is an apocalyptic number.

It is an amenable number.

42915540 is an abundant number, since it is smaller than the sum of its proper divisors (77248140).

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

42915540 is a wasteful number, since it uses less digits than its factorization.

42915540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715271 (or 715269 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 42915540 is about 6550.9953442206. The cubic root of 42915540 is about 350.1102781750.

The spelling of 42915540 in words is "forty-two million, nine hundred fifteen thousand, five hundred forty".