1261426387484 has 24 divisors (see below), whose sum is σ = 2220153455520. Its totient is φ = 627107061056.

The previous prime is 1261426387483. The next prime is 1261426387597. The reversal of 1261426387484 is 4847836241621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261426387483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785432 + ... + 1771935.

It is an arithmetic number, because the mean of its divisors is an integer number (92506393980).

Almost surely, 2^{1261426387484} is an apocalyptic number.

It is an amenable number.

1261426387484 is a deficient number, since it is larger than the sum of its proper divisors (958727068036).

1261426387484 is a wasteful number, since it uses less digits than its factorization.

1261426387484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558077 (or 2558075 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 56.

The spelling of 1261426387484 in words is "one trillion, two hundred sixty-one billion, four hundred twenty-six million, three hundred eighty-seven thousand, four hundred eighty-four".