1030252021 has 4 divisors (see below), whose sum is σ = 1035134944. Its totient is φ = 1025369100.

The previous prime is 1030252009. The next prime is 1030252031. The reversal of 1030252021 is 1202520301.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1030252021 is a prime.

It is a super-2 number, since 2×1030252021² = 2122838453549168882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1030251986 and 1030252004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030252031) 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, 2441145 + ... + 2441566.

It is an arithmetic number, because the mean of its divisors is an integer number (258783736).

Almost surely, 2^1030252021 is an apocalyptic number.

It is an amenable number.

1030252021 is a deficient number, since it is larger than the sum of its proper divisors (4882923).

1030252021 is an equidigital number, since it uses as much as digits as its factorization.

1030252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882922.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1030252021 is about 32097.5391735877. The cubic root of 1030252021 is about 1009.9839951063.

Adding to 1030252021 its reverse (1202520301), we get a palindrome (2232772322).

The spelling of 1030252021 in words is "one billion, thirty million, two hundred fifty-two thousand, twenty-one".