1275345078 has 64 divisors (see below), whose sum is σ = 3047224320. Its totient is φ = 347922432.

The previous prime is 1275345061. The next prime is 1275345131. The reversal of 1275345078 is 8705435721.

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

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, 904438 + ... + 905846.

It is an arithmetic number, because the mean of its divisors is an integer number (47612880).

Almost surely, 2^1275345078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275345078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523612160).

1275345078 is an abundant number, since it is smaller than the sum of its proper divisors (1771879242).

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

1275345078 is a wasteful number, since it uses less digits than its factorization.

1275345078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 1275345078 is about 35711.9738743184. The cubic root of 1275345078 is about 1084.4492601609.

The spelling of 1275345078 in words is "one billion, two hundred seventy-five million, three hundred forty-five thousand, seventy-eight".