126929 has 6 divisors (see below), whose sum is σ = 139650. Its totient is φ = 115280.

The previous prime is 126923. The next prime is 126943. The reversal of 126929 is 929621.

126929 = 7² + 8² + ... + 72².

It can be written as a sum of positive squares in only one way, i.e., 123904 + 3025 = 352^2 + 55^2 .

It is not a de Polignac number, because 126929 - 2⁴ = 126913 is a prime.

It is a super-2 number, since 2×126929² = 32221942082, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (126923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (23275).

2¹²⁶⁹²⁹ is an apocalyptic number.

It is an amenable number.

126929 is a deficient number, since it is larger than the sum of its proper divisors (12721).

126929 is a wasteful number, since it uses less digits than its factorization.

126929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1060 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 126929 is about 356.2709642954. The cubic root of 126929 is about 50.2558881906.

The spelling of 126929 in words is "one hundred twenty-six thousand, nine hundred twenty-nine".