7129661 has 8 divisors (see below), whose sum is σ = 8889024. Its totient is φ = 5555520.

The previous prime is 7129651. The next prime is 7129673. The reversal of 7129661 is 1669217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7129661 - 2²² = 2935357 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 (7129601) 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 7 ways as a sum of consecutive naturals, for example, 46220 + ... + 46373.

It is an arithmetic number, because the mean of its divisors is an integer number (1111128).

Almost surely, 2^7129661 is an apocalyptic number.

It is an amenable number.

7129661 is a deficient number, since it is larger than the sum of its proper divisors (1759363).

7129661 is a wasteful number, since it uses less digits than its factorization.

7129661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92611.

The product of its digits is 4536, while the sum is 32.

The square root of 7129661 is about 2670.1425055603. The cubic root of 7129661 is about 192.4670073327.

The spelling of 7129661 in words is "seven million, one hundred twenty-nine thousand, six hundred sixty-one".