1021253315 has 8 divisors (see below), whose sum is σ = 1225720320. Its totient is φ = 816858432.

The previous prime is 1021253273. The next prime is 1021253339. The reversal of 1021253315 is 5133521201.

It is a happy number.

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 1021253315 - 2¹² = 1021249219 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20687 + ... + 49703.

It is an arithmetic number, because the mean of its divisors is an integer number (153215040).

Almost surely, 2^1021253315 is an apocalyptic number.

1021253315 is a deficient number, since it is larger than the sum of its proper divisors (204467005).

1021253315 is an equidigital number, since it uses as much as digits as its factorization.

1021253315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36061.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1021253315 is about 31957.0542290744. The cubic root of 1021253315 is about 1007.0348334036.

Adding to 1021253315 its reverse (5133521201), we get a palindrome (6154774516).

The spelling of 1021253315 in words is "one billion, twenty-one million, two hundred fifty-three thousand, three hundred fifteen".