126340661 has 4 divisors (see below), whose sum is σ = 126367500. Its totient is φ = 126313824.

The previous prime is 126340637. The next prime is 126340693. The reversal of 126340661 is 166043621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13322500 + 113018161 = 3650^2 + 10631^2 .

It is a cyclic number.

It is not a de Polignac number, because 126340661 - 2¹⁰ = 126339637 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 (126340601) 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, 4286 + ... + 16463.

It is an arithmetic number, because the mean of its divisors is an integer number (31591875).

Almost surely, 2^126340661 is an apocalyptic number.

It is an amenable number.

126340661 is a deficient number, since it is larger than the sum of its proper divisors (26839).

126340661 is an equidigital number, since it uses as much as digits as its factorization.

126340661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 126340661 is about 11240.1361646557. The cubic root of 126340661 is about 501.7811951528.

The spelling of 126340661 in words is "one hundred twenty-six million, three hundred forty thousand, six hundred sixty-one".