129141970 has 32 divisors (see below), whose sum is σ = 240698880. Its totient is φ = 49835520.

The previous prime is 129141931. The next prime is 129141989. The reversal of 129141970 is 79141921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191554 + ... + 192226.

It is an arithmetic number, because the mean of its divisors is an integer number (7521840).

Almost surely, 2^129141970 is an apocalyptic number.

129141970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129141970 is a deficient number, since it is larger than the sum of its proper divisors (111556910).

129141970 is a wasteful number, since it uses less digits than its factorization.

129141970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 129141970 is about 11364.0648537396. The cubic root of 129141970 is about 505.4627265502.

It can be divided in two parts, 12914 and 1970, that added together give a square (14884 = 122²).

The spelling of 129141970 in words is "one hundred twenty-nine million, one hundred forty-one thousand, nine hundred seventy".