1250123543440 has 40 divisors (see below), whose sum is σ = 2916807740928. Its totient is φ = 498282449280.

The previous prime is 1250123543363. The next prime is 1250123543447. The reversal of 1250123543440 is 443453210521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1250123543396 and 1250123543405.

It is not an unprimeable number, because it can be changed into a prime (1250123543447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27586096 + ... + 27631375.

Almost surely, 2^{1250123543440} is an apocalyptic number.

1250123543440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250123543440 is an abundant number, since it is smaller than the sum of its proper divisors (1666684197488).

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

1250123543440 is a wasteful number, since it uses less digits than its factorization.

1250123543440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55217767 (or 55217761 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 1250123543440 its reverse (443453210521), we get a palindrome (1693576753961).

The spelling of 1250123543440 in words is "one trillion, two hundred fifty billion, one hundred twenty-three million, five hundred forty-three thousand, four hundred forty".