42462721 has 8 divisors (see below), whose sum is σ = 48569984. Its totient is φ = 36365760.

The previous prime is 42462709. The next prime is 42462727. The reversal of 42462721 is 12726424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42462721 - 2⁵ = 42462689 is a prime.

It is a pancake number, because a pancake can be divided into 42462721 parts by 9215 straight cuts.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42462721.

It is not an unprimeable number, because it can be changed into a prime (42462727) 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, 11161 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (6071248).

Almost surely, 2^42462721 is an apocalyptic number.

It is an amenable number.

42462721 is a deficient number, since it is larger than the sum of its proper divisors (6107263).

42462721 is a wasteful number, since it uses less digits than its factorization.

42462721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its digits is 5376, while the sum is 28.

The square root of 42462721 is about 6516.3426091635. The cubic root of 42462721 is about 348.8745372130.

The spelling of 42462721 in words is "forty-two million, four hundred sixty-two thousand, seven hundred twenty-one".