126742361 has 4 divisors (see below), whose sum is σ = 134197812. Its totient is φ = 119286912.

The previous prime is 126742283. The next prime is 126742367. The reversal of 126742361 is 163247621.

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 110901961 + 15840400 = 10531^2 + 3980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126742361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126742367) 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, 3727700 + ... + 3727733.

It is an arithmetic number, because the mean of its divisors is an integer number (33549453).

Almost surely, 2^126742361 is an apocalyptic number.

It is an amenable number.

126742361 is a deficient number, since it is larger than the sum of its proper divisors (7455451).

126742361 is an equidigital number, since it uses as much as digits as its factorization.

126742361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7455450.

The product of its digits is 12096, while the sum is 32.

The square root of 126742361 is about 11257.9909841854. The cubic root of 126742361 is about 502.3124367850.

Adding to 126742361 its reverse (163247621), we get a palindrome (289989982).

The spelling of 126742361 in words is "one hundred twenty-six million, seven hundred forty-two thousand, three hundred sixty-one".