1021325813 has 8 divisors (see below), whose sum is σ = 1099733760. Its totient is φ = 944954560.

The previous prime is 1021325771. The next prime is 1021325827. The reversal of 1021325813 is 3185231201.

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 1021325813 - 2¹⁰ = 1021324789 is a prime.

It is a super-2 number, since 2×1021325813² = 2086212832600221938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021325843) 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, 508133 + ... + 510138.

It is an arithmetic number, because the mean of its divisors is an integer number (137466720).

Almost surely, 2^1021325813 is an apocalyptic number.

It is an amenable number.

1021325813 is a deficient number, since it is larger than the sum of its proper divisors (78407947).

1021325813 is a wasteful number, since it uses less digits than its factorization.

1021325813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018347.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1021325813 is about 31958.1885124924. The cubic root of 1021325813 is about 1007.0586623867.

The spelling of 1021325813 in words is "one billion, twenty-one million, three hundred twenty-five thousand, eight hundred thirteen".