126242993 has 4 divisors (see below), whose sum is σ = 126327408. Its totient is φ = 126158580.

The previous prime is 126242983. The next prime is 126243023. The reversal of 126242993 is 399242621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126242993 - 2⁸ = 126242737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126242923) 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, 39923 + ... + 42968.

It is an arithmetic number, because the mean of its divisors is an integer number (31581852).

Almost surely, 2^126242993 is an apocalyptic number.

It is an amenable number.

126242993 is a deficient number, since it is larger than the sum of its proper divisors (84415).

126242993 is an equidigital number, since it uses as much as digits as its factorization.

126242993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84414.

The product of its digits is 46656, while the sum is 38.

The square root of 126242993 is about 11235.7907153880. The cubic root of 126242993 is about 501.6518607027.

The spelling of 126242993 in words is "one hundred twenty-six million, two hundred forty-two thousand, nine hundred ninety-three".