252504235421 has 8 divisors (see below), whose sum is σ = 257457568824. Its totient is φ = 247557905920.

The previous prime is 252504235409. The next prime is 252504235463. The reversal of 252504235421 is 124532405252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87422500 + 252416812921 = 9350^2 + 502411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252504235421 - 2¹⁰ = 252504234397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252504237421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678136 + ... + 1822401.

It is an arithmetic number, because the mean of its divisors is an integer number (32182196103).

Almost surely, 2^252504235421 is an apocalyptic number.

It is an amenable number.

252504235421 is a deficient number, since it is larger than the sum of its proper divisors (4953333403).

252504235421 is a wasteful number, since it uses less digits than its factorization.

252504235421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501951.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 252504235421 in words is "two hundred fifty-two billion, five hundred four million, two hundred thirty-five thousand, four hundred twenty-one".