1253450521 has 8 divisors (see below), whose sum is σ = 1266809544. Its totient is φ = 1240162560.

The previous prime is 1253450491. The next prime is 1253450533. The reversal of 1253450521 is 1250543521.

It can be written as a sum of positive squares in 4 ways, for example, as 290521 + 1253160000 = 539^2 + 35400^2 .

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 1253450521 - 2²⁹ = 716579609 is a prime.

It is a super-2 number, since 2×1253450521² = 3142276417190342882, which contains 22 as substring.

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 1253450521.

It is not an unprimeable number, because it can be changed into a prime (1253450551) 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, 18081 + ... + 53233.

It is an arithmetic number, because the mean of its divisors is an integer number (158351193).

Almost surely, 2^1253450521 is an apocalyptic number.

It is an amenable number.

1253450521 is a deficient number, since it is larger than the sum of its proper divisors (13359023).

1253450521 is a wasteful number, since it uses less digits than its factorization.

1253450521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35531.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1253450521 is about 35404.1031661586. The cubic root of 1253450521 is about 1078.2076239987.

The spelling of 1253450521 in words is "one billion, two hundred fifty-three million, four hundred fifty thousand, five hundred twenty-one".