126105451 has 4 divisors (see below), whose sum is σ = 132742600. Its totient is φ = 119468304.

The previous prime is 126105449. The next prime is 126105461. The reversal of 126105451 is 154501621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154501621 = 8779 ⋅17599.

It is a cyclic number.

It is not a de Polignac number, because 126105451 - 2¹ = 126105449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126105461) 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, 3318546 + ... + 3318583.

It is an arithmetic number, because the mean of its divisors is an integer number (33185650).

Almost surely, 2^126105451 is an apocalyptic number.

126105451 is a deficient number, since it is larger than the sum of its proper divisors (6637149).

126105451 is an equidigital number, since it uses as much as digits as its factorization.

126105451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6637148.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 126105451 is about 11229.6683388246. The cubic root of 126105451 is about 501.4696109221.

The spelling of 126105451 in words is "one hundred twenty-six million, one hundred five thousand, four hundred fifty-one".