126305261 has 4 divisors (see below), whose sum is σ = 127485792. Its totient is φ = 125124732.

The previous prime is 126305227. The next prime is 126305281. The reversal of 126305261 is 162503621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126305261 - 2²² = 122110957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126305261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126305281) 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, 590105 + ... + 590318.

It is an arithmetic number, because the mean of its divisors is an integer number (31871448).

Almost surely, 2^126305261 is an apocalyptic number.

It is an amenable number.

126305261 is a deficient number, since it is larger than the sum of its proper divisors (1180531).

126305261 is a wasteful number, since it uses less digits than its factorization.

126305261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180530.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 126305261 is about 11238.5613403140. The cubic root of 126305261 is about 501.7343252761.

Adding to 126305261 its reverse (162503621), we get a palindrome (288808882).

The spelling of 126305261 in words is "one hundred twenty-six million, three hundred five thousand, two hundred sixty-one".