126525169 has 4 divisors (see below), whose sum is σ = 133967844. Its totient is φ = 119082496.

The previous prime is 126525149. The next prime is 126525187. The reversal of 126525169 is 961525621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961525621 = 7 ⋅137360803.

It can be written as a sum of positive squares in 2 ways, for example, as 64320400 + 62204769 = 8020^2 + 7887^2 .

It is a cyclic number.

It is not a de Polignac number, because 126525169 - 2¹⁹ = 126000881 is a prime.

It is a super-2 number, since 2×126525169² = 32017236780957122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126525109) 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, 3721312 + ... + 3721345.

It is an arithmetic number, because the mean of its divisors is an integer number (33491961).

Almost surely, 2^126525169 is an apocalyptic number.

It is an amenable number.

126525169 is a deficient number, since it is larger than the sum of its proper divisors (7442675).

126525169 is an equidigital number, since it uses as much as digits as its factorization.

126525169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442674.

The product of its digits is 32400, while the sum is 37.

The square root of 126525169 is about 11248.3407220799. The cubic root of 126525169 is about 502.0253435563.

The spelling of 126525169 in words is "one hundred twenty-six million, five hundred twenty-five thousand, one hundred sixty-nine".