129494742 has 16 divisors (see below), whose sum is σ = 278911920. Its totient is φ = 39844512.

The previous prime is 129494737. The next prime is 129494767. The reversal of 129494742 is 247494921.

It is a junction number, because it is equal to n+sod(n) for n = 129494694 and 129494703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830017 + ... + 830172.

It is an arithmetic number, because the mean of its divisors is an integer number (17431995).

Almost surely, 2^129494742 is an apocalyptic number.

129494742 is an abundant number, since it is smaller than the sum of its proper divisors (149417178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129494742 is a wasteful number, since it uses less digits than its factorization.

129494742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660207.

The product of its digits is 145152, while the sum is 42.

The square root of 129494742 is about 11379.5756511392. The cubic root of 129494742 is about 505.9225589329.

The spelling of 129494742 in words is "one hundred twenty-nine million, four hundred ninety-four thousand, seven hundred forty-two".