126622165 has 4 divisors (see below), whose sum is σ = 151946604. Its totient is φ = 101297728.

The previous prime is 126622157. The next prime is 126622187. The reversal of 126622165 is 561226621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561226621 = 19697 ⋅28493.

It can be written as a sum of positive squares in 2 ways, for example, as 87572164 + 39050001 = 9358^2 + 6249^2 .

It is a cyclic number.

It is not a de Polignac number, because 126622165 - 2³ = 126622157 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12662212 + ... + 12662221.

It is an arithmetic number, because the mean of its divisors is an integer number (37986651).

Almost surely, 2^126622165 is an apocalyptic number.

It is an amenable number.

126622165 is a deficient number, since it is larger than the sum of its proper divisors (25324439).

126622165 is an equidigital number, since it uses as much as digits as its factorization.

126622165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25324438.

The product of its digits is 8640, while the sum is 31.

The square root of 126622165 is about 11252.6514653214. The cubic root of 126622165 is about 502.1535973855.

Adding to 126622165 its reverse (561226621), we get a palindrome (687848786).

The spelling of 126622165 in words is "one hundred twenty-six million, six hundred twenty-two thousand, one hundred sixty-five".