129658442 has 8 divisors (see below), whose sum is σ = 195323076. Its totient is φ = 64550752.

The previous prime is 129658433. The next prime is 129658453. The reversal of 129658442 is 244856921.

It can be written as a sum of positive squares in 2 ways, for example, as 129299641 + 358801 = 11371^2 + 599^2 .

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

It is a super-2 number, since 2×129658442² = 33622623163734728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129658442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138653 + ... + 139584.

Almost surely, 2^129658442 is an apocalyptic number.

129658442 is a deficient number, since it is larger than the sum of its proper divisors (65664634).

129658442 is a wasteful number, since it uses less digits than its factorization.

129658442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278472.

The product of its digits is 138240, while the sum is 41.

The square root of 129658442 is about 11386.7660905105. The cubic root of 129658442 is about 506.1356554842.

The spelling of 129658442 in words is "one hundred twenty-nine million, six hundred fifty-eight thousand, four hundred forty-two".