126243406 has 4 divisors (see below), whose sum is σ = 189365112. Its totient is φ = 63121702.

The previous prime is 126243373. The next prime is 126243407. The reversal of 126243406 is 604342621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604342621 = 2657 ⋅227453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126243407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31560850 + ... + 31560853.

It is an arithmetic number, because the mean of its divisors is an integer number (47341278).

Almost surely, 2^126243406 is an apocalyptic number.

126243406 is a deficient number, since it is larger than the sum of its proper divisors (63121706).

126243406 is an equidigital number, since it uses as much as digits as its factorization.

126243406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63121705.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 126243406 is about 11235.8090941418. The cubic root of 126243406 is about 501.6524077482.

The spelling of 126243406 in words is "one hundred twenty-six million, two hundred forty-three thousand, four hundred six".