421651400 has 24 divisors (see below), whose sum is σ = 980339970. Its totient is φ = 168660480.

The previous prime is 421651397. The next prime is 421651427. The reversal of 421651400 is 4156124.

It can be written as a sum of positive squares in 3 ways, for example, as 230493124 + 191158276 = 15182^2 + 13826^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1053929 + ... + 1054328.

Almost surely, 2^421651400 is an apocalyptic number.

421651400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421651400 is an abundant number, since it is smaller than the sum of its proper divisors (558688570).

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

421651400 is a wasteful number, since it uses less digits than its factorization.

421651400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108273 (or 2108264 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 421651400 is about 20534.1520399553. The cubic root of 421651400 is about 749.8674728798.

The spelling of 421651400 in words is "four hundred twenty-one million, six hundred fifty-one thousand, four hundred".