421580407 has 2 divisors, whose sum is σ = 421580408. Its totient is φ = 421580406.

The previous prime is 421580371. The next prime is 421580443. The reversal of 421580407 is 704085124.

It is a balanced prime because it is at equal distance from previous prime (421580371) and next prime (421580443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421580407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421580447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210790203 + 210790204.

It is an arithmetic number, because the mean of its divisors is an integer number (210790204).

Almost surely, 2^421580407 is an apocalyptic number.

421580407 is a deficient number, since it is larger than the sum of its proper divisors (1).

421580407 is an equidigital number, since it uses as much as digits as its factorization.

421580407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 421580407 is about 20532.4233104619. The cubic root of 421580407 is about 749.8253857200.

The spelling of 421580407 in words is "four hundred twenty-one million, five hundred eighty thousand, four hundred seven".