421872610 has 16 divisors (see below), whose sum is σ = 763763256. Its totient is φ = 167772928.

The previous prime is 421872589. The next prime is 421872617. The reversal of 421872610 is 16278124.

It can be written as a sum of positive squares in 4 ways, for example, as 408322849 + 13549761 = 20207^2 + 3681^2 .

It is not an unprimeable number, because it can be changed into a prime (421872617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120199 + ... + 123658.

Almost surely, 2^421872610 is an apocalyptic number.

421872610 is a deficient number, since it is larger than the sum of its proper divisors (341890646).

421872610 is a wasteful number, since it uses less digits than its factorization.

421872610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244037.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 421872610 is about 20539.5377260541. The cubic root of 421872610 is about 749.9985837010.

The spelling of 421872610 in words is "four hundred twenty-one million, eight hundred seventy-two thousand, six hundred ten".