126289697 has 4 divisors (see below), whose sum is σ = 126415380. Its totient is φ = 126164016.

The previous prime is 126289687. The next prime is 126289699. The reversal of 126289697 is 796982621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796982621 = 67 ⋅11895263.

It can be written as a sum of positive squares in 2 ways, for example, as 19704721 + 106584976 = 4439^2 + 10324^2 .

It is a cyclic number.

It is not a de Polignac number, because 126289697 - 2¹⁴ = 126273313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126289699) 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, 61322 + ... + 63347.

It is an arithmetic number, because the mean of its divisors is an integer number (31603845).

Almost surely, 2^126289697 is an apocalyptic number.

It is an amenable number.

126289697 is a deficient number, since it is larger than the sum of its proper divisors (125683).

126289697 is a wasteful number, since it uses less digits than its factorization.

126289697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125682.

The product of its digits is 653184, while the sum is 50.

The square root of 126289697 is about 11237.8688815985. The cubic root of 126289697 is about 501.7137156469.

The spelling of 126289697 in words is "one hundred twenty-six million, two hundred eighty-nine thousand, six hundred ninety-seven".