126999051 has 4 divisors (see below), whose sum is σ = 169332072. Its totient is φ = 84666032.

The previous prime is 126999043. The next prime is 126999053. The reversal of 126999051 is 150999621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 126999051 - 2³ = 126999043 is a prime.

It is a super-2 number, since 2×126999051² = 32257517909801202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126998994 and 126999012.

It is not an unprimeable number, because it can be changed into a prime (126999053) 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, 21166506 + ... + 21166511.

It is an arithmetic number, because the mean of its divisors is an integer number (42333018).

Almost surely, 2^126999051 is an apocalyptic number.

126999051 is a deficient number, since it is larger than the sum of its proper divisors (42333021).

126999051 is an equidigital number, since it uses as much as digits as its factorization.

126999051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42333020.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 126999051 is about 11269.3855644396. The cubic root of 126999051 is about 502.6513175143.

The spelling of 126999051 in words is "one hundred twenty-six million, nine hundred ninety-nine thousand, fifty-one".