126745399 has 16 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 109886560.

The previous prime is 126745397. The next prime is 126745403. The reversal of 126745399 is 993547621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126745399 - 2¹ = 126745397 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 (126745397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24084 + ... + 28870.

It is an arithmetic number, because the mean of its divisors is an integer number (9049320).

Almost surely, 2^126745399 is an apocalyptic number.

126745399 is a deficient number, since it is larger than the sum of its proper divisors (18043721).

126745399 is a wasteful number, since it uses less digits than its factorization.

126745399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910.

The product of its digits is 408240, while the sum is 46.

The square root of 126745399 is about 11258.1259097596. The cubic root of 126745399 is about 502.3164502103.

The spelling of 126745399 in words is "one hundred twenty-six million, seven hundred forty-five thousand, three hundred ninety-nine".