421153434 has 24 divisors (see below), whose sum is σ = 982691892. Its totient is φ = 129585600.

The previous prime is 421153433. The next prime is 421153441. The reversal of 421153434 is 434351124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 403889409 + 17264025 = 20097^2 + 4155^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421153398 and 421153407.

It is not an unprimeable number, because it can be changed into a prime (421153433) 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 11 ways as a sum of consecutive naturals, for example, 899667 + ... + 900134.

Almost surely, 2^421153434 is an apocalyptic number.

421153434 is an abundant number, since it is smaller than the sum of its proper divisors (561538458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421153434 is a wasteful number, since it uses less digits than its factorization.

421153434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799822 (or 1799819 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 421153434 is about 20522.0231458792. The cubic root of 421153434 is about 749.5721613185.

It can be divided in two parts, 42 and 1153434, that added together give a square (1153476 = 1074²).

The spelling of 421153434 in words is "four hundred twenty-one million, one hundred fifty-three thousand, four hundred thirty-four".