1021050253 has 4 divisors (see below), whose sum is σ = 1074789760. Its totient is φ = 967310748.

The previous prime is 1021050229. The next prime is 1021050271. The reversal of 1021050253 is 3520501201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1021050253 - 2⁵ = 1021050221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 53739487 = 1021050253 / (1 + 0 + 2 + 1 + 0 + 5 + 0 + 2 + 5 + 3).

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 1021050253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021050053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26869725 + ... + 26869762.

It is an arithmetic number, because the mean of its divisors is an integer number (268697440).

Almost surely, 2^1021050253 is an apocalyptic number.

It is an amenable number.

1021050253 is a deficient number, since it is larger than the sum of its proper divisors (53739507).

1021050253 is an equidigital number, since it uses as much as digits as its factorization.

1021050253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53739506.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1021050253 is about 31953.8769635235. The cubic root of 1021050253 is about 1006.9680840284.

Adding to 1021050253 its reverse (3520501201), we get a palindrome (4541551454).

The spelling of 1021050253 in words is "one billion, twenty-one million, fifty thousand, two hundred fifty-three".