126368551 has 4 divisors (see below), whose sum is σ = 126394992. Its totient is φ = 126342112.

The previous prime is 126368503. The next prime is 126368603. The reversal of 126368551 is 155863621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155863621 = 4783 ⋅32587.

It is a cyclic number.

It is not a de Polignac number, because 126368551 - 2⁷ = 126368423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126368551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126368251) 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, 3826 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (31598748).

Almost surely, 2^126368551 is an apocalyptic number.

126368551 is a deficient number, since it is larger than the sum of its proper divisors (26441).

126368551 is an equidigital number, since it uses as much as digits as its factorization.

126368551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26440.

The product of its digits is 43200, while the sum is 37.

The square root of 126368551 is about 11241.3767395279. The cubic root of 126368551 is about 501.8181155651.

The spelling of 126368551 in words is "one hundred twenty-six million, three hundred sixty-eight thousand, five hundred fifty-one".