126646426 has 4 divisors (see below), whose sum is σ = 189969642. Its totient is φ = 63323212.

The previous prime is 126646411. The next prime is 126646427. The reversal of 126646426 is 624646621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624646621 = 31 ⋅20149891.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 421201 = 11235^2 + 649^2 .

It is not an unprimeable number, because it can be changed into a prime (126646427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31661605 + ... + 31661608.

Almost surely, 2^126646426 is an apocalyptic number.

126646426 is a deficient number, since it is larger than the sum of its proper divisors (63323216).

126646426 is an equidigital number, since it uses as much as digits as its factorization.

126646426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63323215.

The product of its digits is 82944, while the sum is 37.

The square root of 126646426 is about 11253.7294262835. The cubic root of 126646426 is about 502.1856664692.

The spelling of 126646426 in words is "one hundred twenty-six million, six hundred forty-six thousand, four hundred twenty-six".