6129749 has 4 divisors (see below), whose sum is σ = 6152640. Its totient is φ = 6106860.

The previous prime is 6129743. The next prime is 6129769. The reversal of 6129749 is 9479216.

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.

It is a cyclic number.

It is not a de Polignac number, because 6129749 - 2⁸ = 6129493 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 (6129743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11039 + ... + 11580.

It is an arithmetic number, because the mean of its divisors is an integer number (1538160).

Almost surely, 2^6129749 is an apocalyptic number.

It is an amenable number.

6129749 is a deficient number, since it is larger than the sum of its proper divisors (22891).

6129749 is a wasteful number, since it uses less digits than its factorization.

6129749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22890.

The product of its digits is 27216, while the sum is 38.

The square root of 6129749 is about 2475.8329911365. The cubic root of 6129749 is about 183.0125604764.

The spelling of 6129749 in words is "six million, one hundred twenty-nine thousand, seven hundred forty-nine".