421129672 has 16 divisors (see below), whose sum is σ = 791383500. Its totient is φ = 210094080.

The previous prime is 421129651. The next prime is 421129673. The reversal of 421129672 is 276921124.

It can be written as a sum of positive squares in 2 ways, for example, as 406183716 + 14945956 = 20154^2 + 3866^2 .

It is not an unprimeable number, because it can be changed into a prime (421129673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55029 + ... + 62212.

Almost surely, 2^421129672 is an apocalyptic number.

It is an amenable number.

421129672 is a deficient number, since it is larger than the sum of its proper divisors (370253828).

421129672 is a wasteful number, since it uses less digits than its factorization.

421129672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117696 (or 117692 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 421129672 is about 20521.4441986913. Note that the first 3 decimals coincide. The cubic root of 421129672 is about 749.5580637891.

The spelling of 421129672 in words is "four hundred twenty-one million, one hundred twenty-nine thousand, six hundred seventy-two".