421043953 has 16 divisors (see below), whose sum is σ = 490498560. Its totient is φ = 357638400.

The previous prime is 421043939. The next prime is 421043993. The reversal of 421043953 is 359340124.

It is a cyclic number.

It is not a de Polignac number, because 421043953 - 2⁵ = 421043921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421043993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11400 + ... + 31177.

It is an arithmetic number, because the mean of its divisors is an integer number (30656160).

Almost surely, 2^421043953 is an apocalyptic number.

It is an amenable number.

421043953 is a deficient number, since it is larger than the sum of its proper divisors (69454607).

421043953 is a wasteful number, since it uses less digits than its factorization.

421043953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42648.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 421043953 is about 20519.3555698029. The cubic root of 421043953 is about 749.5072039774.

The spelling of 421043953 in words is "four hundred twenty-one million, forty-three thousand, nine hundred fifty-three".