1286945475 has 24 divisors (see below), whose sum is σ = 2252913840. Its totient is φ = 645995520.

The previous prime is 1286945453. The next prime is 1286945479. The reversal of 1286945475 is 5745496821.

It is not a de Polignac number, because 1286945475 - 2¹³ = 1286937283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1286945479) 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, 503410 + ... + 505959.

It is an arithmetic number, because the mean of its divisors is an integer number (93871410).

Almost surely, 2^1286945475 is an apocalyptic number.

1286945475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1286945475 is a deficient number, since it is larger than the sum of its proper divisors (965968365).

1286945475 is a wasteful number, since it uses less digits than its factorization.

1286945475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009399 (or 1009394 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 1286945475 is about 35874.0222863286. The cubic root of 1286945475 is about 1087.7273510666.

The spelling of 1286945475 in words is "one billion, two hundred eighty-six million, nine hundred forty-five thousand, four hundred seventy-five".