420261635 has 32 divisors (see below), whose sum is σ = 539965440. Its totient is φ = 313315200.

The previous prime is 420261631. The next prime is 420261683. The reversal of 420261635 is 536162024.

It is not a de Polignac number, because 420261635 - 2² = 420261631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420261598 and 420261607.

It is not an unprimeable number, because it can be changed into a prime (420261631) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 974870 + ... + 975300.

It is an arithmetic number, because the mean of its divisors is an integer number (16873920).

Almost surely, 2^420261635 is an apocalyptic number.

420261635 is a deficient number, since it is larger than the sum of its proper divisors (119703805).

420261635 is a wasteful number, since it uses less digits than its factorization.

420261635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 420261635 is about 20500.2837785237. The cubic root of 420261635 is about 749.0427105008.

The spelling of 420261635 in words is "four hundred twenty million, two hundred sixty-one thousand, six hundred thirty-five".