7255661 has 8 divisors (see below), whose sum is σ = 8352960. Its totient is φ = 6173568.

The previous prime is 7255639. The next prime is 7255681. The reversal of 7255661 is 1665527.

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 7255661 - 2¹⁸ = 6993517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7255621) 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, 2756 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (1044120).

Almost surely, 2^7255661 is an apocalyptic number.

It is an amenable number.

7255661 is a deficient number, since it is larger than the sum of its proper divisors (1097299).

7255661 is a wasteful number, since it uses less digits than its factorization.

7255661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603.

The product of its digits is 12600, while the sum is 32.

The square root of 7255661 is about 2693.6334197511. The cubic root of 7255661 is about 193.5941937135.

The spelling of 7255661 in words is "seven million, two hundred fifty-five thousand, six hundred sixty-one".