7198129 has 4 divisors (see below), whose sum is σ = 7204900. Its totient is φ = 7191360.

The previous prime is 7198109. The next prime is 7198133. The reversal of 7198129 is 9218917.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3783025 + 3415104 = 1945^2 + 1848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7198129 is a prime.

It is a super-2 number, since 2×7198129² = 103626122201282, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (7198109) 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, 1404 + ... + 4045.

It is an arithmetic number, because the mean of its divisors is an integer number (1801225).

Almost surely, 2^7198129 is an apocalyptic number.

It is an amenable number.

7198129 is a deficient number, since it is larger than the sum of its proper divisors (6771).

7198129 is a wasteful number, since it uses less digits than its factorization.

7198129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770.

The product of its digits is 9072, while the sum is 37.

The square root of 7198129 is about 2682.9329100818. The cubic root of 7198129 is about 193.0811492625.

Subtracting from 7198129 its product of digits (9072), we obtain a cube (7189057 = 193³).

It can be divided in two parts, 71981 and 29, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 7198129 in words is "seven million, one hundred ninety-eight thousand, one hundred twenty-nine".