68112421 has 16 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 58924800.

The previous prime is 68112413. The next prime is 68112463. The reversal of 68112421 is 12421186.

It is a cyclic number.

It is not a de Polignac number, because 68112421 - 2³ = 68112413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68152421) 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, 68236 + ... + 69226.

It is an arithmetic number, because the mean of its divisors is an integer number (4874688).

Almost surely, 2^68112421 is an apocalyptic number.

It is an amenable number.

68112421 is a deficient number, since it is larger than the sum of its proper divisors (9882587).

68112421 is a wasteful number, since it uses less digits than its factorization.

68112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 768, while the sum is 25.

The square root of 68112421 is about 8253.0249605826. The cubic root of 68112421 is about 408.3903195584.

The spelling of 68112421 in words is "sixty-eight million, one hundred twelve thousand, four hundred twenty-one".