7861261 has 4 divisors (see below), whose sum is σ = 7871292. Its totient is φ = 7851232.

The previous prime is 7861241. The next prime is 7861289. The reversal of 7861261 is 1621687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1621687 = 163 ⋅9949.

It can be written as a sum of positive squares in 2 ways, for example, as 3493161 + 4368100 = 1869^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 7861261 - 2⁵ = 7861229 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 (7861201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (1967823).

Almost surely, 2^7861261 is an apocalyptic number.

It is an amenable number.

7861261 is a deficient number, since it is larger than the sum of its proper divisors (10031).

7861261 is an equidigital number, since it uses as much as digits as its factorization.

7861261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10030.

The product of its digits is 4032, while the sum is 31.

The square root of 7861261 is about 2803.7940366582. The cubic root of 7861261 is about 198.8370930088.

The spelling of 7861261 in words is "seven million, eight hundred sixty-one thousand, two hundred sixty-one".