126242542 has 4 divisors (see below), whose sum is σ = 189363816. Its totient is φ = 63121270.

The previous prime is 126242537. The next prime is 126242549. The reversal of 126242542 is 245242621.

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

It is a self number, because there is not a number n which added to its sum of digits gives 126242542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126242549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31560634 + ... + 31560637.

It is an arithmetic number, because the mean of its divisors is an integer number (47340954).

Almost surely, 2^126242542 is an apocalyptic number.

126242542 is a deficient number, since it is larger than the sum of its proper divisors (63121274).

126242542 is an equidigital number, since it uses as much as digits as its factorization.

126242542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63121273.

The product of its digits is 7680, while the sum is 28.

The square root of 126242542 is about 11235.7706455766. The cubic root of 126242542 is about 501.6512633223.

The spelling of 126242542 in words is "one hundred twenty-six million, two hundred forty-two thousand, five hundred forty-two".