126661837 has 4 divisors (see below), whose sum is σ = 126731196. Its totient is φ = 126592480.

The previous prime is 126661819. The next prime is 126661859. The reversal of 126661837 is 738166621.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106894921 + 19766916 = 10339^2 + 4446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126661837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126661837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126661807) 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, 31864 + ... + 35617.

It is an arithmetic number, because the mean of its divisors is an integer number (31682799).

Almost surely, 2^126661837 is an apocalyptic number.

It is an amenable number.

126661837 is a deficient number, since it is larger than the sum of its proper divisors (69359).

126661837 is an equidigital number, since it uses as much as digits as its factorization.

126661837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69358.

The product of its digits is 72576, while the sum is 40.

The square root of 126661837 is about 11254.4141118052. The cubic root of 126661837 is about 502.2060351698.

The spelling of 126661837 in words is "one hundred twenty-six million, six hundred sixty-one thousand, eight hundred thirty-seven".