421606072 has 8 divisors (see below), whose sum is σ = 790511400. Its totient is φ = 210803032.

The previous prime is 421606057. The next prime is 421606139. The reversal of 421606072 is 270606124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 421606072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26350372 + ... + 26350387.

It is an arithmetic number, because the mean of its divisors is an integer number (98813925).

Almost surely, 2^421606072 is an apocalyptic number.

It is an amenable number.

421606072 is a deficient number, since it is larger than the sum of its proper divisors (368905328).

421606072 is a wasteful number, since it uses less digits than its factorization.

421606072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52700765 (or 52700761 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 421606072 is about 20533.0482880648. The cubic root of 421606072 is about 749.8406013844.

The spelling of 421606072 in words is "four hundred twenty-one million, six hundred six thousand, seventy-two".