126199749 has 8 divisors (see below), whose sum is σ = 181209952. Its totient is φ = 77661360.

The previous prime is 126199741. The next prime is 126199753. The reversal of 126199749 is 947991621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126199749 - 2³ = 126199741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126199698 and 126199707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126199741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1617907 + ... + 1617984.

It is an arithmetic number, because the mean of its divisors is an integer number (22651244).

Almost surely, 2^126199749 is an apocalyptic number.

It is an amenable number.

126199749 is a deficient number, since it is larger than the sum of its proper divisors (55010203).

126199749 is a wasteful number, since it uses less digits than its factorization.

126199749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235907.

The product of its digits is 244944, while the sum is 48.

The square root of 126199749 is about 11233.8661644155. The cubic root of 126199749 is about 501.5945745911.

The spelling of 126199749 in words is "one hundred twenty-six million, one hundred ninety-nine thousand, seven hundred forty-nine".