1322725287 has 16 divisors (see below), whose sum is σ = 1906702560. Its totient is φ = 810811392.

The previous prime is 1322725253. The next prime is 1322725291. The reversal of 1322725287 is 7825272231.

It is not a de Polignac number, because 1322725287 - 2¹¹ = 1322723239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322725237) 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, 55962 + ... + 76007.

It is an arithmetic number, because the mean of its divisors is an integer number (119168910).

Almost surely, 2^1322725287 is an apocalyptic number.

1322725287 is a deficient number, since it is larger than the sum of its proper divisors (583977273).

1322725287 is a wasteful number, since it uses less digits than its factorization.

1322725287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132242.

The product of its digits is 94080, while the sum is 39.

The square root of 1322725287 is about 36369.2904385004. The cubic root of 1322725287 is about 1097.7157244630.

The spelling of 1322725287 in words is "one billion, three hundred twenty-two million, seven hundred twenty-five thousand, two hundred eighty-seven".