129254496 has 48 divisors (see below), whose sum is σ = 387765504. Its totient is φ = 36929664.

The previous prime is 129254491. The next prime is 129254513. The reversal of 129254496 is 694452921.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129254491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95500 + ... + 96843.

It is an arithmetic number, because the mean of its divisors is an integer number (8078448).

Almost surely, 2^129254496 is an apocalyptic number.

129254496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129254496 is an abundant number, since it is smaller than the sum of its proper divisors (258511008).

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

129254496 is a wasteful number, since it uses less digits than its factorization.

129254496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192363 (or 192355 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 129254496 is about 11369.0147330365. The cubic root of 129254496 is about 505.6094931588.

The spelling of 129254496 in words is "one hundred twenty-nine million, two hundred fifty-four thousand, four hundred ninety-six".