126240161 has 16 divisors (see below), whose sum is σ = 138283200. Its totient is φ = 114787008.

The previous prime is 126240137. The next prime is 126240173. The reversal of 126240161 is 161042621.

126240161 = 358² + 359² + ... + 751².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126240161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126240061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107966 + ... + 109128.

It is an arithmetic number, because the mean of its divisors is an integer number (8642700).

Almost surely, 2^126240161 is an apocalyptic number.

It is an amenable number.

126240161 is a deficient number, since it is larger than the sum of its proper divisors (12043039).

126240161 is a wasteful number, since it uses less digits than its factorization.

126240161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 126240161 is about 11235.6646888380. The cubic root of 126240161 is about 501.6481095012.

Adding to 126240161 its reverse (161042621), we get a palindrome (287282782).

The spelling of 126240161 in words is "one hundred twenty-six million, two hundred forty thousand, one hundred sixty-one".