240597021 has 16 divisors (see below), whose sum is σ = 379267200. Its totient is φ = 132742848.

The previous prime is 240597017. The next prime is 240597029. The reversal of 240597021 is 120795042.

It is not a de Polignac number, because 240597021 - 2² = 240597017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240597021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240597029) 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, 196926 + ... + 198143.

It is an arithmetic number, because the mean of its divisors is an integer number (23704200).

Almost surely, 2^240597021 is an apocalyptic number.

240597021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

240597021 is a deficient number, since it is larger than the sum of its proper divisors (138670179).

240597021 is a wasteful number, since it uses less digits than its factorization.

240597021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395108.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 240597021 is about 15511.1901864428. The cubic root of 240597021 is about 621.9613753444.

The spelling of 240597021 in words is "two hundred forty million, five hundred ninety-seven thousand, twenty-one".