126406442 has 4 divisors (see below), whose sum is σ = 189609666. Its totient is φ = 63203220.

The previous prime is 126406439. The next prime is 126406481. The reversal of 126406442 is 244604621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113018161 + 13388281 = 10631^2 + 3659^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31601609 + ... + 31601612.

Almost surely, 2^126406442 is an apocalyptic number.

126406442 is a deficient number, since it is larger than the sum of its proper divisors (63203224).

126406442 is an equidigital number, since it uses as much as digits as its factorization.

126406442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63203223.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 126406442 is about 11243.0619494869. The cubic root of 126406442 is about 501.8682664661.

The spelling of 126406442 in words is "one hundred twenty-six million, four hundred six thousand, four hundred forty-two".