1275743140 has 48 divisors (see below), whose sum is σ = 3074569344. Its totient is φ = 435571200.

The previous prime is 1275743101. The next prime is 1275743141. The reversal of 1275743140 is 413475721.

It is a junction number, because it is equal to n+sod(n) for n = 1275743096 and 1275743105.

It is not an unprimeable number, because it can be changed into a prime (1275743141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14835 + ... + 52645.

It is an arithmetic number, because the mean of its divisors is an integer number (64053528).

Almost surely, 2^1275743140 is an apocalyptic number.

1275743140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275743140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537284672).

1275743140 is an abundant number, since it is smaller than the sum of its proper divisors (1798826204).

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

1275743140 is a wasteful number, since it uses less digits than its factorization.

1275743140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38068 (or 38066 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1275743140 is about 35717.5466682694. The cubic root of 1275743140 is about 1084.5620748923.

The spelling of 1275743140 in words is "one billion, two hundred seventy-five million, seven hundred forty-three thousand, one hundred forty".