126697429 has 4 divisors (see below), whose sum is σ = 126720076. Its totient is φ = 126674784.

The previous prime is 126697399. The next prime is 126697451. The reversal of 126697429 is 924796621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 106131204 + 20566225 = 10302^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 126697429 - 2⁵ = 126697397 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 (126697489) 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, 3817 + ... + 16369.

It is an arithmetic number, because the mean of its divisors is an integer number (31680019).

Almost surely, 2^126697429 is an apocalyptic number.

It is an amenable number.

126697429 is a deficient number, since it is larger than the sum of its proper divisors (22647).

126697429 is a wasteful number, since it uses less digits than its factorization.

126697429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22646.

The product of its digits is 326592, while the sum is 46.

The square root of 126697429 is about 11255.9952469784. The cubic root of 126697429 is about 502.2530707612.

The spelling of 126697429 in words is "one hundred twenty-six million, six hundred ninety-seven thousand, four hundred twenty-nine".