3731521 has 2 divisors, whose sum is σ = 3731522. Its totient is φ = 3731520.

The previous prime is 3731513. The next prime is 3731527. The reversal of 3731521 is 1251373.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3027600 + 703921 = 1740^2 + 839^2 .

It is a cyclic number.

It is not a de Polignac number, because 3731521 - 2³ = 3731513 is a prime.

It is a Chen prime.

It is equal to p₂₆₅₅₁₃ and since 3731521 and 265513 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 3731492 and 3731501.

It is not a weakly prime, because it can be changed into another prime (3731527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1865760 + 1865761.

It is an arithmetic number, because the mean of its divisors is an integer number (1865761).

Almost surely, 2^3731521 is an apocalyptic number.

It is an amenable number.

3731521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3731521 is an equidigital number, since it uses as much as digits as its factorization.

3731521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 22.

The square root of 3731521 is about 1931.7145234221. The cubic root of 3731521 is about 155.1060114179.

Adding to 3731521 its reverse (1251373), we get a palindrome (4982894).

The spelling of 3731521 in words is "three million, seven hundred thirty-one thousand, five hundred twenty-one".