421253505434 has 16 divisors (see below), whose sum is σ = 658659085920. Its totient is φ = 201811362480.

The previous prime is 421253505403. The next prime is 421253505461. The reversal of 421253505434 is 434505352124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27713744 + ... + 27728939.

It is an arithmetic number, because the mean of its divisors is an integer number (41166192870).

Almost surely, 2^421253505434 is an apocalyptic number.

421253505434 is a deficient number, since it is larger than the sum of its proper divisors (237405580486).

421253505434 is a wasteful number, since it uses less digits than its factorization.

421253505434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55442845.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 421253505434 its reverse (434505352124), we get a palindrome (855758857558).

The spelling of 421253505434 in words is "four hundred twenty-one billion, two hundred fifty-three million, five hundred five thousand, four hundred thirty-four".