3537421 has 2 divisors, whose sum is σ = 3537422. Its totient is φ = 3537420.

The previous prime is 3537407. The next prime is 3537427. The reversal of 3537421 is 1247353.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3422500 + 114921 = 1850^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 3537421 - 2⁷ = 3537293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3537427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1768710 + 1768711.

It is an arithmetic number, because the mean of its divisors is an integer number (1768711).

Almost surely, 2^3537421 is an apocalyptic number.

It is an amenable number.

3537421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3537421 is an equidigital number, since it uses as much as digits as its factorization.

3537421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 25.

The square root of 3537421 is about 1880.8032858329. The cubic root of 3537421 is about 152.3686372131.

The spelling of 3537421 in words is "three million, five hundred thirty-seven thousand, four hundred twenty-one".