126399279 has 4 divisors (see below), whose sum is σ = 168532376. Its totient is φ = 84266184.

The previous prime is 126399277. The next prime is 126399293. The reversal of 126399279 is 972993621.

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

It is not a de Polignac number, because 126399279 - 2¹ = 126399277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126399271) 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, 21066544 + ... + 21066549.

It is an arithmetic number, because the mean of its divisors is an integer number (42133094).

Almost surely, 2^126399279 is an apocalyptic number.

126399279 is a deficient number, since it is larger than the sum of its proper divisors (42133097).

126399279 is an equidigital number, since it uses as much as digits as its factorization.

126399279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42133096.

The product of its digits is 367416, while the sum is 48.

The square root of 126399279 is about 11242.7433929624. The cubic root of 126399279 is about 501.8587865951.

The spelling of 126399279 in words is "one hundred twenty-six million, three hundred ninety-nine thousand, two hundred seventy-nine".