3525991 has 12 divisors (see below), whose sum is σ = 4132728. Its totient is φ = 2999472.

The previous prime is 3525979. The next prime is 3526027. The reversal of 3525991 is 1995253.

It is a happy number.

It is not a de Polignac number, because 3525991 - 2⁹ = 3525479 is a prime.

It is a super-2 number, since 2×3525991² = 24865225064162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3525911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10965 + ... + 11281.

It is an arithmetic number, because the mean of its divisors is an integer number (344394).

Almost surely, 2^3525991 is an apocalyptic number.

3525991 is a deficient number, since it is larger than the sum of its proper divisors (606737).

3525991 is a wasteful number, since it uses less digits than its factorization.

3525991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 551 counting only the distinct ones).

The product of its digits is 12150, while the sum is 34.

The square root of 3525991 is about 1877.7622320198. The cubic root of 3525991 is about 152.2043506072.

The spelling of 3525991 in words is "three million, five hundred twenty-five thousand, nine hundred ninety-one".