129422087 has 4 divisors (see below), whose sum is σ = 129903480. Its totient is φ = 128940696.

The previous prime is 129422063. The next prime is 129422101. The reversal of 129422087 is 780224921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780224921 = 7 ⋅111460703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129422087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129422047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240293 + ... + 240830.

It is an arithmetic number, because the mean of its divisors is an integer number (32475870).

Almost surely, 2^129422087 is an apocalyptic number.

129422087 is a deficient number, since it is larger than the sum of its proper divisors (481393).

129422087 is an equidigital number, since it uses as much as digits as its factorization.

129422087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481392.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 129422087 is about 11376.3828609976. The cubic root of 129422087 is about 505.8279227091.

The spelling of 129422087 in words is "one hundred twenty-nine million, four hundred twenty-two thousand, eighty-seven".