421140521515250 has 32 divisors (see below), whose sum is σ = 788376429599616. Its totient is φ = 168455915161200.

The previous prime is 421140521515249. The next prime is 421140521515291. The reversal of 421140521515250 is 52515125041124.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194670017 + ... + 196821483.

It is an arithmetic number, because the mean of its divisors is an integer number (24636763424988).

Almost surely, 2^{421140521515250} is an apocalyptic number.

421140521515250 is a deficient number, since it is larger than the sum of its proper divisors (367235908084366).

421140521515250 is a wasteful number, since it uses less digits than its factorization.

421140521515250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934467 (or 2934457 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 38.

Adding to 421140521515250 its reverse (52515125041124), we get a palindrome (473655646556374).

The spelling of 421140521515250 in words is "four hundred twenty-one trillion, one hundred forty billion, five hundred twenty-one million, five hundred fifteen thousand, two hundred fifty".