462140721 has 20 divisors (see below), whose sum is σ = 788981952. Its totient is φ = 264080088.

The previous prime is 462140717. The next prime is 462140747. The reversal of 462140721 is 127041264.

It is not a de Polignac number, because 462140721 - 2² = 462140717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (462140711) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 406965 + ... + 408098.

Almost surely, 2^462140721 is an apocalyptic number.

It is an amenable number.

462140721 is a deficient number, since it is larger than the sum of its proper divisors (326841231).

462140721 is an equidigital number, since it uses as much as digits as its factorization.

462140721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815082 (or 815073 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 462140721 is about 21497.4584776899. The cubic root of 462140721 is about 773.1398864426.

Adding to 462140721 its reverse (127041264), we get a palindrome (589181985).

The spelling of 462140721 in words is "four hundred sixty-two million, one hundred forty thousand, seven hundred twenty-one".