129941421 has 16 divisors (see below), whose sum is σ = 191424384. Its totient is φ = 77986304.

The previous prime is 129941419. The next prime is 129941443. The reversal of 129941421 is 124149921.

It is a cyclic number.

It is not a de Polignac number, because 129941421 - 2¹ = 129941419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129941411) 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, 54216 + ... + 56561.

It is an arithmetic number, because the mean of its divisors is an integer number (11964024).

Almost surely, 2^129941421 is an apocalyptic number.

It is an amenable number.

129941421 is a deficient number, since it is larger than the sum of its proper divisors (61482963).

129941421 is a wasteful number, since it uses less digits than its factorization.

129941421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110820.

The product of its digits is 5184, while the sum is 33.

The square root of 129941421 is about 11399.1851024536. The cubic root of 129941421 is about 506.5036009082.

The spelling of 129941421 in words is "one hundred twenty-nine million, nine hundred forty-one thousand, four hundred twenty-one".