6139555 has 4 divisors (see below), whose sum is σ = 7367472. Its totient is φ = 4911640.

The previous prime is 6139547. The next prime is 6139559. The reversal of 6139555 is 5559316.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6139555 - 2³ = 6139547 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 6139555.

It is not an unprimeable number, because it can be changed into a prime (6139559) 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, 613951 + ... + 613960.

It is an arithmetic number, because the mean of its divisors is an integer number (1841868).

Almost surely, 2^6139555 is an apocalyptic number.

6139555 is a deficient number, since it is larger than the sum of its proper divisors (1227917).

6139555 is a wasteful number, since it uses less digits than its factorization.

6139555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227916.

The product of its digits is 20250, while the sum is 34.

The square root of 6139555 is about 2477.8125433535. The cubic root of 6139555 is about 183.1100992741.

The spelling of 6139555 in words is "six million, one hundred thirty-nine thousand, five hundred fifty-five".