3421557 has 12 divisors (see below), whose sum is σ = 4991584. Its totient is φ = 2258280.

The previous prime is 3421531. The next prime is 3421567. The reversal of 3421557 is 7551243.

It is a happy number.

It is not a de Polignac number, because 3421557 - 2¹⁰ = 3420533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3421557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421567) 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, 919 + ... + 2772.

Almost surely, 2^3421557 is an apocalyptic number.

It is an amenable number.

3421557 is a deficient number, since it is larger than the sum of its proper divisors (1570027).

3421557 is a wasteful number, since it uses less digits than its factorization.

3421557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800 (or 3797 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 3421557 is about 1849.7451175770. The cubic root of 3421557 is about 150.6865858707.

The spelling of 3421557 in words is "three million, four hundred twenty-one thousand, five hundred fifty-seven".