7125691 has 8 divisors (see below), whose sum is σ = 7496064. Its totient is φ = 6764160.

The previous prime is 7125689. The next prime is 7125707. The reversal of 7125691 is 1965217.

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 7125691 - 2¹ = 7125689 is a prime.

It is a super-3 number, since 3×7125691³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

7125691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7125611) 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, 526 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (937008).

Almost surely, 2^7125691 is an apocalyptic number.

7125691 is a deficient number, since it is larger than the sum of its proper divisors (370373).

7125691 is a wasteful number, since it uses less digits than its factorization.

7125691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421.

The product of its digits is 3780, while the sum is 31.

The square root of 7125691 is about 2669.3989960289. The cubic root of 7125691 is about 192.4312769810.

The spelling of 7125691 in words is "seven million, one hundred twenty-five thousand, six hundred ninety-one".