421574536 has 8 divisors (see below), whose sum is σ = 790452270. Its totient is φ = 210787264.

The previous prime is 421574533. The next prime is 421574579. The reversal of 421574536 is 635475124.

It can be written as a sum of positive squares in only one way, i.e., 421480900 + 93636 = 20530^2 + 306^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 421574495 and 421574504.

It is not an unprimeable number, because it can be changed into a prime (421574533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26348401 + ... + 26348416.

Almost surely, 2^421574536 is an apocalyptic number.

It is an amenable number.

421574536 is a deficient number, since it is larger than the sum of its proper divisors (368877734).

421574536 is a wasteful number, since it uses less digits than its factorization.

421574536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52696823 (or 52696819 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 421574536 is about 20532.2803409655. The cubic root of 421574536 is about 749.8219049722.

The spelling of 421574536 in words is "four hundred twenty-one million, five hundred seventy-four thousand, five hundred thirty-six".