42742420 has 48 divisors (see below), whose sum is σ = 108622080. Its totient is φ = 13791744.

The previous prime is 42742409. The next prime is 42742421. The reversal of 42742420 is 2424724.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42742421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6600 + ... + 11359.

It is an arithmetic number, because the mean of its divisors is an integer number (2262960).

Almost surely, 2^42742420 is an apocalyptic number.

It is an amenable number.

42742420 is an abundant number, since it is smaller than the sum of its proper divisors (65879660).

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

42742420 is a wasteful number, since it uses less digits than its factorization.

42742420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17992 (or 17990 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 42742420 is about 6537.7687325264. The cubic root of 42742420 is about 349.6388656004.

The spelling of 42742420 in words is "forty-two million, seven hundred forty-two thousand, four hundred twenty".