3757021 has 4 divisors (see below), whose sum is σ = 3761692. Its totient is φ = 3752352.

The previous prime is 3757009. The next prime is 3757043. The reversal of 3757021 is 1207573.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1207573 = 41 ⋅29453.

It can be written as a sum of positive squares in 2 ways, for example, as 1836025 + 1920996 = 1355^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3757021 - 2⁵ = 3756989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3757081) 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, 786 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (940423).

Almost surely, 2^3757021 is an apocalyptic number.

It is an amenable number.

3757021 is a deficient number, since it is larger than the sum of its proper divisors (4671).

3757021 is a wasteful number, since it uses less digits than its factorization.

3757021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 3757021 is about 1938.3036397840. The cubic root of 3757021 is about 155.4585243133.

It can be divided in two parts, 375 and 7021, that added together give a square (7396 = 86²).

The spelling of 3757021 in words is "three million, seven hundred fifty-seven thousand, twenty-one".