7881261 has 8 divisors (see below), whose sum is σ = 10680864. Its totient is φ = 5167920.

The previous prime is 7881253. The next prime is 7881271. The reversal of 7881261 is 1621887.

It is a happy number.

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

It is not a de Polignac number, because 7881261 - 2³ = 7881253 is a prime.

It is a super-2 number, since 2×7881261² = 124228549900242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881221) 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, 21351 + ... + 21716.

It is an arithmetic number, because the mean of its divisors is an integer number (1335108).

Almost surely, 2^7881261 is an apocalyptic number.

It is an amenable number.

7881261 is a deficient number, since it is larger than the sum of its proper divisors (2799603).

7881261 is a wasteful number, since it uses less digits than its factorization.

7881261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43131.

The product of its digits is 5376, while the sum is 33.

The square root of 7881261 is about 2807.3583668638. The cubic root of 7881261 is about 199.0055720938.

The spelling of 7881261 in words is "seven million, eight hundred eighty-one thousand, two hundred sixty-one".