126381256937 has 4 divisors (see below), whose sum is σ = 136102892100. Its totient is φ = 116659621776.

The previous prime is 126381256867. The next prime is 126381256949. The reversal of 126381256937 is 739652183621.

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 18558340441 + 107822916496 = 136229^2 + 328364^2 .

It is a cyclic number.

It is not a de Polignac number, because 126381256937 - 2¹² = 126381252841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126381256987) 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, 4860817562 + ... + 4860817587.

It is an arithmetic number, because the mean of its divisors is an integer number (34025723025).

Almost surely, 2^126381256937 is an apocalyptic number.

It is an amenable number.

126381256937 is a deficient number, since it is larger than the sum of its proper divisors (9721635163).

126381256937 is an equidigital number, since it uses as much as digits as its factorization.

126381256937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721635162.

The product of its digits is 3265920, while the sum is 53.

The spelling of 126381256937 in words is "one hundred twenty-six billion, three hundred eighty-one million, two hundred fifty-six thousand, nine hundred thirty-seven".