1125391267440 has 240 divisors, whose sum is σ = 4365555738336. Its totient is φ = 256773734400.

The previous prime is 1125391267421. The next prime is 1125391267477. The reversal of 1125391267440 is 447621935211.

1125391267440 is a `hidden beast` number, since 1 + 1 + 2 + 539 + 1 + 2 + 6 + 74 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4044621 + ... + 4313900.

Almost surely, 2^{1125391267440} is an apocalyptic number.

1125391267440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125391267440 is an abundant number, since it is smaller than the sum of its proper divisors (3240164470896).

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

1125391267440 is a wasteful number, since it uses less digits than its factorization.

1125391267440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358568 (or 8358559 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 1125391267440 in words is "one trillion, one hundred twenty-five billion, three hundred ninety-one million, two hundred sixty-seven thousand, four hundred forty".