1021913 has 8 divisors (see below), whose sum is σ = 1076928. Its totient is φ = 967824.

The previous prime is 1021907. The next prime is 1021919. The reversal of 1021913 is 3191201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1021907) and next prime (1021919).

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 1021913 - 2⁴ = 1021897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021891 and 1021900.

It is not an unprimeable number, because it can be changed into a prime (1021919) 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, 3470 + ... + 3752.

It is an arithmetic number, because the mean of its divisors is an integer number (134616).

2^1021913 is an apocalyptic number.

It is an amenable number.

1021913 is a deficient number, since it is larger than the sum of its proper divisors (55015).

1021913 is a wasteful number, since it uses less digits than its factorization.

1021913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1021913 is about 1010.8971263190. The cubic root of 1021913 is about 100.7251620226.

The spelling of 1021913 in words is "one million, twenty-one thousand, nine hundred thirteen".