126728397 has 12 divisors (see below), whose sum is σ = 185631264. Its totient is φ = 83295240.

The previous prime is 126728369. The next prime is 126728429. The reversal of 126728397 is 793827621.

It is not a de Polignac number, because 126728397 - 2⁶ = 126728333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126728317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98523 + ... + 99800.

It is an arithmetic number, because the mean of its divisors is an integer number (15469272).

Almost surely, 2^126728397 is an apocalyptic number.

It is an amenable number.

126728397 is a deficient number, since it is larger than the sum of its proper divisors (58902867).

126728397 is a wasteful number, since it uses less digits than its factorization.

126728397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198400 (or 198397 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 126728397 is about 11257.3707854010. The cubic root of 126728397 is about 502.2939884713.

The spelling of 126728397 in words is "one hundred twenty-six million, seven hundred twenty-eight thousand, three hundred ninety-seven".