126829921 has 8 divisors (see below), whose sum is σ = 134208000. Its totient is φ = 119522160.

The previous prime is 126829907. The next prime is 126829931. The reversal of 126829921 is 129928621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126829921 - 2¹¹ = 126827873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126829931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13846 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (16776000).

Almost surely, 2^126829921 is an apocalyptic number.

It is an amenable number.

126829921 is a deficient number, since it is larger than the sum of its proper divisors (7378079).

126829921 is a wasteful number, since it uses less digits than its factorization.

126829921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35159.

The product of its digits is 31104, while the sum is 40.

The square root of 126829921 is about 11261.8791060817. The cubic root of 126829921 is about 502.4280843924.

The spelling of 126829921 in words is "one hundred twenty-six million, eight hundred twenty-nine thousand, nine hundred twenty-one".