126779451 has 8 divisors (see below), whose sum is σ = 169163280. Its totient is φ = 84457632.

The previous prime is 126779447. The next prime is 126779479. The reversal of 126779451 is 154977621.

It is a happy number.

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

It is not a de Polignac number, because 126779451 - 2² = 126779447 is a prime.

It is a super-2 number, since 2×126779451² = 32146058391722802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126779441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10500 + ... + 19073.

It is an arithmetic number, because the mean of its divisors is an integer number (21145410).

Almost surely, 2^126779451 is an apocalyptic number.

126779451 is a deficient number, since it is larger than the sum of its proper divisors (42383829).

126779451 is a wasteful number, since it uses less digits than its factorization.

126779451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31005.

The product of its digits is 105840, while the sum is 42.

The square root of 126779451 is about 11259.6381380575. The cubic root of 126779451 is about 502.3614310624.

The spelling of 126779451 in words is "one hundred twenty-six million, seven hundred seventy-nine thousand, four hundred fifty-one".