1275905241240 has 128 divisors (see below), whose sum is σ = 4381233269760. Its totient is φ = 291188749824.

The previous prime is 1275905241209. The next prime is 1275905241329. The reversal of 1275905241240 is 421425095721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1275905241192 and 1275905241201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614524 + ... + 1711563.

It is an arithmetic number, because the mean of its divisors is an integer number (34228384920).

Almost surely, 2^{1275905241240} is an apocalyptic number.

1275905241240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275905241240 is an abundant number, since it is smaller than the sum of its proper divisors (3105328028520).

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

1275905241240 is a wasteful number, since it uses less digits than its factorization.

1275905241240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326761 (or 2326757 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 1275905241240 in words is "one trillion, two hundred seventy-five billion, nine hundred five million, two hundred forty-one thousand, two hundred forty".