1252921501 has 8 divisors (see below), whose sum is σ = 1382210424. Its totient is φ = 1128334080.

The previous prime is 1252921493. The next prime is 1252921511. The reversal of 1252921501 is 1051292521.

It can be written as a sum of positive squares in 4 ways, for example, as 31069476 + 1221852025 = 5574^2 + 34955^2 .

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 1252921501 - 2³ = 1252921493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252921501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252921511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174816 + ... + 1175881.

It is an arithmetic number, because the mean of its divisors is an integer number (172776303).

Almost surely, 2^1252921501 is an apocalyptic number.

It is an amenable number.

1252921501 is a deficient number, since it is larger than the sum of its proper divisors (129288923).

1252921501 is a wasteful number, since it uses less digits than its factorization.

1252921501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350751.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1252921501 is about 35396.6312097635. The cubic root of 1252921501 is about 1078.0559164651.

The spelling of 1252921501 in words is "one billion, two hundred fifty-two million, nine hundred twenty-one thousand, five hundred one".