6156987 has 4 divisors (see below), whose sum is σ = 8209320. Its totient is φ = 4104656.

The previous prime is 6156979. The next prime is 6156989. The reversal of 6156987 is 7896516.

6156987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6156987 - 2³ = 6156979 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6156989) 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, 1026162 + ... + 1026167.

It is an arithmetic number, because the mean of its divisors is an integer number (2052330).

Almost surely, 2^6156987 is an apocalyptic number.

6156987 is a deficient number, since it is larger than the sum of its proper divisors (2052333).

6156987 is a wasteful number, since it uses less digits than its factorization.

6156987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052332.

The product of its digits is 90720, while the sum is 42.

The square root of 6156987 is about 2481.3276688096. The cubic root of 6156987 is about 183.2832366335.

The spelling of 6156987 in words is "six million, one hundred fifty-six thousand, nine hundred eighty-seven".