129420002 has 4 divisors (see below), whose sum is σ = 194130006. Its totient is φ = 64710000.

The previous prime is 129419989. The next prime is 129420041. The reversal of 129420002 is 200024921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200024921 = 3271 ⋅61151.

It can be written as a sum of positive squares in only one way, i.e., 122124601 + 7295401 = 11051^2 + 2701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32354999 + ... + 32355002.

Almost surely, 2^129420002 is an apocalyptic number.

129420002 is a deficient number, since it is larger than the sum of its proper divisors (64710004).

129420002 is an equidigital number, since it uses as much as digits as its factorization.

129420002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64710003.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 129420002 is about 11376.2912234172. The cubic root of 129420002 is about 505.8252063853.

Adding to 129420002 its reverse (200024921), we get a palindrome (329444923).

The spelling of 129420002 in words is "one hundred twenty-nine million, four hundred twenty thousand, two".