1945321275 has 24 divisors (see below), whose sum is σ = 3276955440. Its totient is φ = 1017927040.

The previous prime is 1945321249. The next prime is 1945321277. The reversal of 1945321275 is 5721235491.

It is not a de Polignac number, because 1945321275 - 2⁸ = 1945321019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1945321277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240720 + ... + 248669.

It is an arithmetic number, because the mean of its divisors is an integer number (136539810).

Almost surely, 2^1945321275 is an apocalyptic number.

1945321275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1945321275 is a deficient number, since it is larger than the sum of its proper divisors (1331634165).

1945321275 is a wasteful number, since it uses less digits than its factorization.

1945321275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489455 (or 489450 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 1945321275 is about 44105.7963877765. The cubic root of 1945321275 is about 1248.3329831655.

The spelling of 1945321275 in words is "one billion, nine hundred forty-five million, three hundred twenty-one thousand, two hundred seventy-five".