3744845421 has 4 divisors (see below), whose sum is σ = 4993127232. Its totient is φ = 2496563612.

The previous prime is 3744845417. The next prime is 3744845479. The reversal of 3744845421 is 1245484473.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3744845421 - 2² = 3744845417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3744845411) 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, 624140901 + ... + 624140906.

It is an arithmetic number, because the mean of its divisors is an integer number (1248281808).

Almost surely, 2^3744845421 is an apocalyptic number.

It is an amenable number.

3744845421 is a deficient number, since it is larger than the sum of its proper divisors (1248281811).

3744845421 is a wasteful number, since it uses less digits than its factorization.

3744845421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248281810.

The product of its digits is 430080, while the sum is 42.

The square root of 3744845421 is about 61195.1421356303. The cubic root of 3744845421 is about 1552.9040832197.

The spelling of 3744845421 in words is "three billion, seven hundred forty-four million, eight hundred forty-five thousand, four hundred twenty-one".