72420042 has 16 divisors (see below), whose sum is σ = 145124352. Its totient is φ = 24092640.

The previous prime is 72420013. The next prime is 72420043. The reversal of 72420042 is 24002427.

It is not an unprimeable number, because it can be changed into a prime (72420043) 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, 8458 + ... + 14709.

It is an arithmetic number, because the mean of its divisors is an integer number (9070272).

Almost surely, 2^72420042 is an apocalyptic number.

72420042 is an abundant number, since it is smaller than the sum of its proper divisors (72704310).

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

72420042 is a wasteful number, since it uses less digits than its factorization.

72420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23693.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 72420042 is about 8509.9965922437. The cubic root of 72420042 is about 416.8241988509.

Adding to 72420042 its reverse (24002427), we get a palindrome (96422469).

The spelling of 72420042 in words is "seventy-two million, four hundred twenty thousand, forty-two".