421629537 has 32 divisors (see below), whose sum is σ = 674039808. Its totient is φ = 229211136.

The previous prime is 421629493. The next prime is 421629547. The reversal of 421629537 is 735926124.

It is not a de Polignac number, because 421629537 - 2⁶ = 421629473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421629495 and 421629504.

It is not an unprimeable number, because it can be changed into a prime (421629547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90958 + ... + 95480.

It is an arithmetic number, because the mean of its divisors is an integer number (21063744).

Almost surely, 2^421629537 is an apocalyptic number.

It is an amenable number.

421629537 is a deficient number, since it is larger than the sum of its proper divisors (252410271).

421629537 is a wasteful number, since it uses less digits than its factorization.

421629537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its digits is 90720, while the sum is 39.

The square root of 421629537 is about 20533.6196760337. The cubic root of 421629537 is about 749.8545122240.

The spelling of 421629537 in words is "four hundred twenty-one million, six hundred twenty-nine thousand, five hundred thirty-seven".