1204672621 has 4 divisors (see below), whose sum is σ = 1205217244. Its totient is φ = 1204128000.

The previous prime is 1204672607. The next prime is 1204672627. The reversal of 1204672621 is 1262764021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1262764021 = 14821 ⋅85201.

It can be written as a sum of positive squares in 2 ways, for example, as 941876100 + 262796521 = 30690^2 + 16211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204672621 - 2⁵ = 1204672589 is a prime.

It is a super-2 number, since 2×1204672621² = 2902472247574019282, 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 (1204672627) 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, 268980 + ... + 273421.

It is an arithmetic number, because the mean of its divisors is an integer number (301304311).

Almost surely, 2^1204672621 is an apocalyptic number.

It is an amenable number.

1204672621 is a deficient number, since it is larger than the sum of its proper divisors (544623).

1204672621 is an equidigital number, since it uses as much as digits as its factorization.

1204672621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544622.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1204672621 is about 34708.3940999868. The cubic root of 1204672621 is about 1064.0360607961.

The spelling of 1204672621 in words is "one billion, two hundred four million, six hundred seventy-two thousand, six hundred twenty-one".