3752745921 has 12 divisors (see below), whose sum is σ = 5424382548. Its totient is φ = 2500100064.

The previous prime is 3752745901. The next prime is 3752745947. The reversal of 3752745921 is 1295472573.

It is a happy number.

3752745921 is a `hidden beast` number, since 3 + 7 + 52 + 7 + 4 + 592 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3085247025 + 667498896 = 55545^2 + 25836^2 .

It is not a de Polignac number, because 3752745921 - 2¹⁴ = 3752729537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3752745901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130410 + ... + 156563.

It is an arithmetic number, because the mean of its divisors is an integer number (452031879).

Almost surely, 2^3752745921 is an apocalyptic number.

It is an amenable number.

3752745921 is a deficient number, since it is larger than the sum of its proper divisors (1671636627).

3752745921 is a wasteful number, since it uses less digits than its factorization.

3752745921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288432 (or 288429 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 3752745921 is about 61259.6598178606. The cubic root of 3752745921 is about 1553.9953700115.

The spelling of 3752745921 in words is "three billion, seven hundred fifty-two million, seven hundred forty-five thousand, nine hundred twenty-one".