3745942221 has 16 divisors (see below), whose sum is σ = 5786297984. Its totient is φ = 2111215104.

The previous prime is 3745942201. The next prime is 3745942259. The reversal of 3745942221 is 1222495473.

It is not a de Polignac number, because 3745942221 - 2¹⁴ = 3745925837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3745942221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3745942201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1220236 + ... + 1223301.

It is an arithmetic number, because the mean of its divisors is an integer number (361643624).

Almost surely, 2^3745942221 is an apocalyptic number.

It is an amenable number.

3745942221 is a deficient number, since it is larger than the sum of its proper divisors (2040355763).

3745942221 is a wasteful number, since it uses less digits than its factorization.

3745942221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443620.

The product of its digits is 120960, while the sum is 39.

The square root of 3745942221 is about 61204.1029752091. The cubic root of 3745942221 is about 1553.0556746075.

The spelling of 3745942221 in words is "three billion, seven hundred forty-five million, nine hundred forty-two thousand, two hundred twenty-one".