129019000 has 128 divisors (see below), whose sum is σ = 339318720. Its totient is φ = 45504000.

The previous prime is 129018979. The next prime is 129019003. The reversal of 129019000 is 910921.

It is a super-2 number, since 2×129019000² = 33291804722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129019003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406842 + ... + 407158.

Almost surely, 2^129019000 is an apocalyptic number.

129019000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129019000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169659360).

129019000 is an abundant number, since it is smaller than the sum of its proper divisors (210299720).

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

129019000 is a wasteful number, since it uses less digits than its factorization.

129019000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 129019000 is about 11358.6530891651. The cubic root of 129019000 is about 505.3022404055.

Adding to 129019000 its reverse (910921), we get a palindrome (129929921).

The spelling of 129019000 in words is "one hundred twenty-nine million, nineteen thousand".