1253036521 has 8 divisors (see below), whose sum is σ = 1371996288. Its totient is φ = 1134918000.

The previous prime is 1253036507. The next prime is 1253036537. The reversal of 1253036521 is 1256303521.

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 1253036521 - 2¹¹ = 1253034473 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 1253036521.

It is not an unprimeable number, because it can be changed into a prime (1253036501) 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, 207190 + ... + 213151.

It is an arithmetic number, because the mean of its divisors is an integer number (171499536).

Almost surely, 2^1253036521 is an apocalyptic number.

1253036521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1253036521 is a deficient number, since it is larger than the sum of its proper divisors (118959767).

1253036521 is a wasteful number, since it uses less digits than its factorization.

1253036521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420623.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 1253036521 is about 35398.2559033634. The cubic root of 1253036521 is about 1078.0889044847.

The spelling of 1253036521 in words is "one billion, two hundred fifty-three million, thirty-six thousand, five hundred twenty-one".