421317087 has 16 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 274400672.

The previous prime is 421317079. The next prime is 421317089. The reversal of 421317087 is 780713124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421317087 - 2³ = 421317079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421317089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32458 + ... + 43544.

It is an arithmetic number, because the mean of its divisors is an integer number (35925120).

Almost surely, 2^421317087 is an apocalyptic number.

421317087 is a deficient number, since it is larger than the sum of its proper divisors (153484833).

421317087 is a wasteful number, since it uses less digits than its factorization.

421317087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11382.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 421317087 is about 20526.0100116900. The cubic root of 421317087 is about 749.6692390399.

The spelling of 421317087 in words is "four hundred twenty-one million, three hundred seventeen thousand, eighty-seven".