1261383394425 has 48 divisors (see below), whose sum is σ = 2600087964672. Its totient is φ = 524211278400.

The previous prime is 1261383394423. The next prime is 1261383394541. The reversal of 1261383394425 is 5244933831621.

It is not a de Polignac number, because 1261383394425 - 2¹ = 1261383394423 is a prime.

It is a super-2 number, since 2×1261383394425² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1261383394423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109204909 + ... + 109216458.

It is an arithmetic number, because the mean of its divisors is an integer number (54168499264).

Almost surely, 2^{1261383394425} is an apocalyptic number.

1261383394425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1261383394425 is an abundant number, since it is smaller than the sum of its proper divisors (1338704570247).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261383394425 is a wasteful number, since it uses less digits than its factorization.

1261383394425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218421398 (or 218421393 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The spelling of 1261383394425 in words is "one trillion, two hundred sixty-one billion, three hundred eighty-three million, three hundred ninety-four thousand, four hundred twenty-five".