1261110497 has 8 divisors (see below), whose sum is σ = 1268133120. Its totient is φ = 1254098160.

The previous prime is 1261110481. The next prime is 1261110527. The reversal of 1261110497 is 7940111621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1261110497 - 2⁴ = 1261110481 is a prime.

It is a super-5 number, since 5×1261110497⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261110437) 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 7 ways as a sum of consecutive naturals, for example, 450779 + ... + 453567.

It is an arithmetic number, because the mean of its divisors is an integer number (158516640).

Almost surely, 2^1261110497 is an apocalyptic number.

It is an amenable number.

1261110497 is a deficient number, since it is larger than the sum of its proper divisors (7022623).

1261110497 is a wasteful number, since it uses less digits than its factorization.

1261110497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1261110497 is about 35512.1176079377. The cubic root of 1261110497 is about 1080.3995141160.

The spelling of 1261110497 in words is "one billion, two hundred sixty-one million, one hundred ten thousand, four hundred ninety-seven".