3642905 has 12 divisors (see below), whose sum is σ = 5085540. Its totient is φ = 2497824.

The previous prime is 3642883. The next prime is 3642911. The reversal of 3642905 is 5092463.

It can be written as a sum of positive squares in 2 ways, for example, as 1073296 + 2569609 = 1036^2 + 1603^2 .

It is not a de Polignac number, because 3642905 - 2⁸ = 3642649 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7190 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (423795).

Almost surely, 2^3642905 is an apocalyptic number.

3642905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3642905 is a deficient number, since it is larger than the sum of its proper divisors (1442635).

3642905 is a wasteful number, since it uses less digits than its factorization.

3642905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14888 (or 14881 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 3642905 is about 1908.6395678598. The cubic root of 3642905 is about 153.8683447798.

The spelling of 3642905 in words is "three million, six hundred forty-two thousand, nine hundred five".