4155540 has 24 divisors (see below), whose sum is σ = 11635680. Its totient is φ = 1108128.

The previous prime is 4155539. The next prime is 4155551. The reversal of 4155540 is 455514.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4155540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34570 + ... + 34689.

It is an arithmetic number, because the mean of its divisors is an integer number (484820).

Almost surely, 2^4155540 is an apocalyptic number.

It is an amenable number.

4155540 is an abundant number, since it is smaller than the sum of its proper divisors (7480140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4155540 is a wasteful number, since it uses less digits than its factorization.

4155540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69271 (or 69269 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 4155540 is about 2038.5141647779. The cubic root of 4155540 is about 160.7715340319.

The spelling of 4155540 in words is "four million, one hundred fifty-five thousand, five hundred forty".