3641557 has 4 divisors (see below), whose sum is σ = 3657420. Its totient is φ = 3625696.

The previous prime is 3641551. The next prime is 3641563. The reversal of 3641557 is 7551463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7551463 = 617 ⋅12239.

It is an interprime number because it is at equal distance from previous prime (3641551) and next prime (3641563).

It can be written as a sum of positive squares in 2 ways, for example, as 2588881 + 1052676 = 1609^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 3641557 - 2³ = 3641549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3641557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3641551) 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, 7582 + ... + 8047.

It is an arithmetic number, because the mean of its divisors is an integer number (914355).

Almost surely, 2^3641557 is an apocalyptic number.

It is an amenable number.

3641557 is a deficient number, since it is larger than the sum of its proper divisors (15863).

3641557 is a wasteful number, since it uses less digits than its factorization.

3641557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15862.

The product of its digits is 12600, while the sum is 31.

The square root of 3641557 is about 1908.2864040809. The cubic root of 3641557 is about 153.8493635805.

The spelling of 3641557 in words is "three million, six hundred forty-one thousand, five hundred fifty-seven".