7901129 has 4 divisors (see below), whose sum is σ = 7979460. Its totient is φ = 7822800.

The previous prime is 7901119. The next prime is 7901149. The reversal of 7901129 is 9211097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9211097 = 7 ⋅1315871.

It can be written as a sum of positive squares in 2 ways, for example, as 6901129 + 1000000 = 2627^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 7901129 - 2⁸ = 7900873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7901119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39014 + ... + 39215.

It is an arithmetic number, because the mean of its divisors is an integer number (1994865).

Almost surely, 2^7901129 is an apocalyptic number.

It is an amenable number.

7901129 is a deficient number, since it is larger than the sum of its proper divisors (78331).

7901129 is a wasteful number, since it uses less digits than its factorization.

7901129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78330.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 7901129 is about 2810.8946974229. The cubic root of 7901129 is about 199.1726572391.

The spelling of 7901129 in words is "seven million, nine hundred one thousand, one hundred twenty-nine".