1021604213 has 8 divisors (see below), whose sum is σ = 1167748032. Its totient is φ = 875510496.

The previous prime is 1021604209. The next prime is 1021604237. The reversal of 1021604213 is 3124061201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021604213 - 2² = 1021604209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021604713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56681 + ... + 72497.

It is an arithmetic number, because the mean of its divisors is an integer number (145968504).

Almost surely, 2^1021604213 is an apocalyptic number.

It is an amenable number.

1021604213 is a deficient number, since it is larger than the sum of its proper divisors (146143819).

1021604213 is an equidigital number, since it uses as much as digits as its factorization.

1021604213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25051.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1021604213 is about 31962.5439068920. The cubic root of 1021604213 is about 1007.1501577278.

Adding to 1021604213 its reverse (3124061201), we get a palindrome (4145665414).

The spelling of 1021604213 in words is "one billion, twenty-one million, six hundred four thousand, two hundred thirteen".