129402 has 48 divisors (see below), whose sum is σ = 349440. Its totient is φ = 33696.

The previous prime is 129401. The next prime is 129403. The reversal of 129402 is 204921.

129402 = T₁₃ + T₁₄ + ... + T₉₁.

129402 = 54² + 55² + ... + 81².

It is an interprime number because it is at equal distance from previous prime (129401) and next prime (129403).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (129401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1599 + ... + 1677.

It is an arithmetic number, because the mean of its divisors is an integer number (7280).

2¹²⁹⁴⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174720).

129402 is an abundant number, since it is smaller than the sum of its proper divisors (220038).

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

129402 is a wasteful number, since it uses less digits than its factorization.

129402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 129402 is about 359.7248948850. The cubic root of 129402 is about 50.5801752289.

It can be divided in two parts, 1 and 29402, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 129402 in words is "one hundred twenty-nine thousand, four hundred two".