42520124 has 12 divisors (see below), whose sum is σ = 74461464. Its totient is φ = 21245424.

The previous prime is 42520117. The next prime is 42520129. The reversal of 42520124 is 42102524.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42520096 and 42520105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (6205122).

Almost surely, 2^42520124 is an apocalyptic number.

It is an amenable number.

42520124 is a deficient number, since it is larger than the sum of its proper divisors (31941340).

42520124 is a wasteful number, since it uses less digits than its factorization.

42520124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324 (or 7322 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42520124 is about 6520.7456628824. The cubic root of 42520124 is about 349.0316744787.

Adding to 42520124 its reverse (42102524), we get a palindrome (84622648).

The spelling of 42520124 in words is "forty-two million, five hundred twenty thousand, one hundred twenty-four".