421157706 has 8 divisors (see below), whose sum is σ = 842315424. Its totient is φ = 140385900.

The previous prime is 421157683. The next prime is 421157713. The reversal of 421157706 is 607751124.

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

421157706 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35096470 + ... + 35096481.

It is an arithmetic number, because the mean of its divisors is an integer number (105289428).

Almost surely, 2^421157706 is an apocalyptic number.

421157706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421157706 is a wasteful number, since it uses less digits than its factorization.

421157706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70192956.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 421157706 is about 20522.1272289205. The cubic root of 421157706 is about 749.5746957562.

The spelling of 421157706 in words is "four hundred twenty-one million, one hundred fifty-seven thousand, seven hundred six".