7648261 has 2 divisors, whose sum is σ = 7648262. Its totient is φ = 7648260.

The previous prime is 7648243. The next prime is 7648309. The reversal of 7648261 is 1628467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7257636 + 390625 = 2694^2 + 625^2 .

It is an emirp because it is prime and its reverse (1628467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7648261 - 2⁹ = 7647749 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7648211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824130 + 3824131.

It is an arithmetic number, because the mean of its divisors is an integer number (3824131).

Almost surely, 2^7648261 is an apocalyptic number.

It is an amenable number.

7648261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7648261 is an equidigital number, since it uses as much as digits as its factorization.

7648261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 7648261 is about 2765.5489509318. The cubic root of 7648261 is about 197.0248021201.

It can be divided in two parts, 764 and 8261, that added together give a square (9025 = 95²).

The spelling of 7648261 in words is "seven million, six hundred forty-eight thousand, two hundred sixty-one".