1260126551 has 6 divisors (see below), whose sum is σ = 1276285752. Its totient is φ = 1244169420.

The previous prime is 1260126487. The next prime is 1260126557. The reversal of 1260126551 is 1556210621.

It is a happy number.

It is not a de Polignac number, because 1260126551 - 2⁶ = 1260126487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260126557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94715 + ... + 107196.

It is an arithmetic number, because the mean of its divisors is an integer number (212714292).

Almost surely, 2^1260126551 is an apocalyptic number.

1260126551 is a deficient number, since it is larger than the sum of its proper divisors (16159201).

1260126551 is an frugal number, since it uses more digits than its factorization.

1260126551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202069 (or 201990 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1260126551 is about 35498.2612391086. The cubic root of 1260126551 is about 1080.1184572286.

The spelling of 1260126551 in words is "one billion, two hundred sixty million, one hundred twenty-six thousand, five hundred fifty-one".