129890542 has 8 divisors (see below), whose sum is σ = 199588032. Its totient is φ = 63361200.

The previous prime is 129890531. The next prime is 129890549. The reversal of 129890542 is 245098921.

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

It is a junction number, because it is equal to n+sod(n) for n = 129890495 and 129890504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129890549) 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, 791934 + ... + 792097.

It is an arithmetic number, because the mean of its divisors is an integer number (24948504).

Almost surely, 2^129890542 is an apocalyptic number.

129890542 is a deficient number, since it is larger than the sum of its proper divisors (69697490).

129890542 is a wasteful number, since it uses less digits than its factorization.

129890542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584074.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 129890542 is about 11396.9531893397. The cubic root of 129890542 is about 506.4374845492.

The spelling of 129890542 in words is "one hundred twenty-nine million, eight hundred ninety thousand, five hundred forty-two".