6156749 has 4 divisors (see below), whose sum is σ = 6162240. Its totient is φ = 6151260.

The previous prime is 6156739. The next prime is 6156767. The reversal of 6156749 is 9476516.

6156749 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6156749 - 2¹⁶ = 6091213 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6156719) 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, 389 + ... + 3530.

It is an arithmetic number, because the mean of its divisors is an integer number (1540560).

Almost surely, 2^6156749 is an apocalyptic number.

It is an amenable number.

6156749 is a deficient number, since it is larger than the sum of its proper divisors (5491).

6156749 is a wasteful number, since it uses less digits than its factorization.

6156749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490.

The product of its digits is 45360, while the sum is 38.

The square root of 6156749 is about 2481.2797101496. The cubic root of 6156749 is about 183.2808749820.

It can be divided in two parts, 61567 and 49, that added together give a palindrome (61616).

The spelling of 6156749 in words is "six million, one hundred fifty-six thousand, seven hundred forty-nine".