240353421 has 32 divisors (see below), whose sum is σ = 413337600. Its totient is φ = 120550080.

The previous prime is 240353417. The next prime is 240353453. The reversal of 240353421 is 124353042.

It is not a de Polignac number, because 240353421 - 2² = 240353417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240353391 and 240353400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240353461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11241 + ... + 24638.

It is an arithmetic number, because the mean of its divisors is an integer number (12916800).

Almost surely, 2^240353421 is an apocalyptic number.

240353421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

240353421 is a deficient number, since it is larger than the sum of its proper divisors (172984179).

240353421 is a wasteful number, since it uses less digits than its factorization.

240353421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35929.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 240353421 is about 15503.3358023362. The cubic root of 240353421 is about 621.7513963613.

The spelling of 240353421 in words is "two hundred forty million, three hundred fifty-three thousand, four hundred twenty-one".