420263641 has 12 divisors (see below), whose sum is σ = 514609680. Its totient is φ = 341265960.

The previous prime is 420263633. The next prime is 420263651. The reversal of 420263641 is 146362024.

It is not a de Polignac number, because 420263641 - 2³ = 420263633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420263651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224775 + ... + 226636.

It is an arithmetic number, because the mean of its divisors is an integer number (42884140).

Almost surely, 2^420263641 is an apocalyptic number.

It is an amenable number.

420263641 is a deficient number, since it is larger than the sum of its proper divisors (94346039).

420263641 is a wasteful number, since it uses less digits than its factorization.

420263641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451444 (or 451437 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420263641 is about 20500.3327046173. The cubic root of 420263641 is about 749.0439022800.

The spelling of 420263641 in words is "four hundred twenty million, two hundred sixty-three thousand, six hundred forty-one".