240867421 has 2 divisors, whose sum is σ = 240867422. Its totient is φ = 240867420.

The previous prime is 240867413. The next prime is 240867469. The reversal of 240867421 is 124768042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211382521 + 29484900 = 14539^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 240867421 - 2³ = 240867413 is a prime.

It is a super-2 number, since 2×240867421² = 116034228998382482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240867481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120433710 + 120433711.

It is an arithmetic number, because the mean of its divisors is an integer number (120433711).

Almost surely, 2^240867421 is an apocalyptic number.

It is an amenable number.

240867421 is a deficient number, since it is larger than the sum of its proper divisors (1).

240867421 is an equidigital number, since it uses as much as digits as its factorization.

240867421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 240867421 is about 15519.9040267651. The cubic root of 240867421 is about 622.1942895494.

The spelling of 240867421 in words is "two hundred forty million, eight hundred sixty-seven thousand, four hundred twenty-one".