102129898 has 16 divisors (see below), whose sum is σ = 165228840. Its totient is φ = 47065536.

The previous prime is 102129877. The next prime is 102129899. The reversal of 102129898 is 898921201.

It can be written as a sum of positive squares in 4 ways, for example, as 88491649 + 13638249 = 9407^2 + 3693^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102129898.

It is not an unprimeable number, because it can be changed into a prime (102129899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17088 + ... + 22276.

Almost surely, 2^102129898 is an apocalyptic number.

102129898 is a deficient number, since it is larger than the sum of its proper divisors (63098942).

102129898 is a wasteful number, since it uses less digits than its factorization.

102129898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 102129898 is about 10105.9338014851. The cubic root of 102129898 is about 467.4311305797.

The spelling of 102129898 in words is "one hundred two million, one hundred twenty-nine thousand, eight hundred ninety-eight".