126404525123 has 2 divisors, whose sum is σ = 126404525124. Its totient is φ = 126404525122.

The previous prime is 126404525119. The next prime is 126404525153. The reversal of 126404525123 is 321525404621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126404525123 - 2² = 126404525119 is a prime.

It is a super-2 number, since 2×126404525123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126404525153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63202262561 + 63202262562.

It is an arithmetic number, because the mean of its divisors is an integer number (63202262562).

Almost surely, 2^126404525123 is an apocalyptic number.

126404525123 is a deficient number, since it is larger than the sum of its proper divisors (1).

126404525123 is an equidigital number, since it uses as much as digits as its factorization.

126404525123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 126404525123 its reverse (321525404621), we get a palindrome (447929929744).

The spelling of 126404525123 in words is "one hundred twenty-six billion, four hundred four million, five hundred twenty-five thousand, one hundred twenty-three".