1261263306430 has 16 divisors (see below), whose sum is σ = 2274263898480. Its totient is φ = 503618667712.

The previous prime is 1261263306421. The next prime is 1261263306461. The reversal of 1261263306430 is 346033621621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261263306430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110825884 + ... + 110837263.

It is an arithmetic number, because the mean of its divisors is an integer number (142141493655).

Almost surely, 2^{1261263306430} is an apocalyptic number.

1261263306430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261263306430 is a deficient number, since it is larger than the sum of its proper divisors (1013000592050).

1261263306430 is a wasteful number, since it uses less digits than its factorization.

1261263306430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221663723.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 1261263306430 in words is "one trillion, two hundred sixty-one billion, two hundred sixty-three million, three hundred six thousand, four hundred thirty".