240134021 has 4 divisors (see below), whose sum is σ = 240768000. Its totient is φ = 239500044.

The previous prime is 240134017. The next prime is 240134039. The reversal of 240134021 is 120431042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240134021 - 2² = 240134017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240134221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316421 + ... + 317178.

It is an arithmetic number, because the mean of its divisors is an integer number (60192000).

Almost surely, 2^240134021 is an apocalyptic number.

It is an amenable number.

240134021 is a deficient number, since it is larger than the sum of its proper divisors (633979).

240134021 is an equidigital number, since it uses as much as digits as its factorization.

240134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633978.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 240134021 is about 15496.2582903100. The cubic root of 240134021 is about 621.5621558898.

Adding to 240134021 its reverse (120431042), we get a palindrome (360565063).

The spelling of 240134021 in words is "two hundred forty million, one hundred thirty-four thousand, twenty-one".