3761521 has 4 divisors (see below), whose sum is σ = 3766500. Its totient is φ = 3756544.

The previous prime is 3761507. The next prime is 3761557. The reversal of 3761521 is 1251673.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1251673 = 37 ⋅33829.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 3370896 = 625^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 3761521 - 2⁷ = 3761393 is a prime.

It is a Duffinian number.

3761521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3761501) 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, 1096 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (941625).

Almost surely, 2^3761521 is an apocalyptic number.

It is an amenable number.

3761521 is a deficient number, since it is larger than the sum of its proper divisors (4979).

3761521 is an equidigital number, since it uses as much as digits as its factorization.

3761521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978.

The product of its digits is 1260, while the sum is 25.

The square root of 3761521 is about 1939.4641012403. The cubic root of 3761521 is about 155.5205667527.

It can be divided in two parts, 37615 and 21, that added together give a square (37636 = 194²).

The spelling of 3761521 in words is "three million, seven hundred sixty-one thousand, five hundred twenty-one".