123456761 has 2 divisors, whose sum is σ = 123456762. Its totient is φ = 123456760.

The previous prime is 123456757. The next prime is 123456791. The reversal of 123456761 is 167654321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120012025 + 3444736 = 10955^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 123456761 - 2² = 123456757 is a prime.

It is a super-2 number, since 2×123456761² = 30483143673222242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123456731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61728380 + 61728381.

It is an arithmetic number, because the mean of its divisors is an integer number (61728381).

Almost surely, 2^123456761 is an apocalyptic number.

It is an amenable number.

123456761 is a deficient number, since it is larger than the sum of its proper divisors (1).

123456761 is an equidigital number, since it uses as much as digits as its factorization.

123456761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 123456761 is about 11111.1098005555. The cubic root of 123456761 is about 497.9338215744.

The spelling of 123456761 in words is "one hundred twenty-three million, four hundred fifty-six thousand, seven hundred sixty-one".