126155731 has 8 divisors (see below), whose sum is σ = 135977744. Its totient is φ = 116350560.

The previous prime is 126155717. The next prime is 126155737. The reversal of 126155731 is 137551621.

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

It is a cyclic number.

It is not a de Polignac number, because 126155731 - 2⁵ = 126155699 is a prime.

It is a super-2 number, since 2×126155731² = 31830536928288722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126155693 and 126155702.

It is not an unprimeable number, because it can be changed into a prime (126155737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14440 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (16997218).

Almost surely, 2^126155731 is an apocalyptic number.

126155731 is a deficient number, since it is larger than the sum of its proper divisors (9822013).

126155731 is a wasteful number, since it uses less digits than its factorization.

126155731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421.

The product of its digits is 6300, while the sum is 31.

The square root of 126155731 is about 11231.9068283173. The cubic root of 126155731 is about 501.5362497062.

The spelling of 126155731 in words is "one hundred twenty-six million, one hundred fifty-five thousand, seven hundred thirty-one".