126817629 has 16 divisors (see below), whose sum is σ = 170916480. Its totient is φ = 83637440.

The previous prime is 126817619. The next prime is 126817643. The reversal of 126817629 is 926718621.

It is a cyclic number.

It is not a de Polignac number, because 126817629 - 2¹⁹ = 126293341 is a prime.

It is a super-2 number, since 2×126817629² = 32165422050363282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126817619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134299 + ... + 135239.

It is an arithmetic number, because the mean of its divisors is an integer number (10682280).

Almost surely, 2^126817629 is an apocalyptic number.

It is an amenable number.

126817629 is a deficient number, since it is larger than the sum of its proper divisors (44098851).

126817629 is a wasteful number, since it uses less digits than its factorization.

126817629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its digits is 72576, while the sum is 42.

The square root of 126817629 is about 11261.3333579998. Note that the first 4 decimals coincide. The cubic root of 126817629 is about 502.4118525613.

The spelling of 126817629 in words is "one hundred twenty-six million, eight hundred seventeen thousand, six hundred twenty-nine".