421139407 has 8 divisors (see below), whose sum is σ = 473253984. Its totient is φ = 371841888.

The previous prime is 421139401. The next prime is 421139429. The reversal of 421139407 is 704931124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421139407 - 2¹⁵ = 421106639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421139401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703948 + ... + 704545.

It is an arithmetic number, because the mean of its divisors is an integer number (59156748).

Almost surely, 2^421139407 is an apocalyptic number.

421139407 is a deficient number, since it is larger than the sum of its proper divisors (52114577).

421139407 is a wasteful number, since it uses less digits than its factorization.

421139407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408529.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 421139407 is about 20521.6813882294. The cubic root of 421139407 is about 749.5638394382.

The spelling of 421139407 in words is "four hundred twenty-one million, one hundred thirty-nine thousand, four hundred seven".