1252345521 has 8 divisors (see below), whose sum is σ = 1908336064. Its totient is φ = 715626000.

The previous prime is 1252345519. The next prime is 1252345547. The reversal of 1252345521 is 1255432521.

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

It is not a de Polignac number, because 1252345521 - 2¹ = 1252345519 is a prime.

It is a super-2 number, since 2×1252345521² = 3136738607937522882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252345621) 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, 29817730 + ... + 29817771.

It is an arithmetic number, because the mean of its divisors is an integer number (238542008).

Almost surely, 2^1252345521 is an apocalyptic number.

It is an amenable number.

1252345521 is a deficient number, since it is larger than the sum of its proper divisors (655990543).

1252345521 is an equidigital number, since it uses as much as digits as its factorization.

1252345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59635511.

The product of its digits is 12000, while the sum is 30.

The square root of 1252345521 is about 35388.4941894961. The cubic root of 1252345521 is about 1077.8906936050.

The spelling of 1252345521 in words is "one billion, two hundred fifty-two million, three hundred forty-five thousand, five hundred twenty-one".