3124921801 has 3 divisors (see below), whose sum is σ = 3124977703. Its totient is φ = 3124865900.

The previous prime is 3124921783. The next prime is 3124921819. The reversal of 3124921801 is 1081294213.

The square root of 3124921801 is 55901.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (3124921783) and next prime (3124921819).

It can be written as a sum of positive squares in only one way, i.e., 2975593401 + 149328400 = 54549^2 + 12220^2 .

It is not a de Polignac number, because 3124921801 - 2⁵ = 3124921769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3124921831) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27951 + ... + 83851.

Almost surely, 2^3124921801 is an apocalyptic number.

3124921801 is the 55901-st square number.

3124921801 is the 27951-st centered octagonal number.

It is an amenable number.

3124921801 is a deficient number, since it is larger than the sum of its proper divisors (55902).

3124921801 is an frugal number, since it uses more digits than its factorization.

3124921801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111802 (or 55901 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The cubic root of 3124921801 is about 1461.9966740573.

The spelling of 3124921801 in words is "three billion, one hundred twenty-four million, nine hundred twenty-one thousand, eight hundred one".