1395217845 has 128 divisors (see below), whose sum is σ = 2929996800. Its totient is φ = 616771584.

The previous prime is 1395217819. The next prime is 1395217853. The reversal of 1395217845 is 5487125931.

1395217845 is a `hidden beast` number, since 1 + 395 + 217 + 8 + 45 = 666.

It is not a de Polignac number, because 1395217845 - 2⁷ = 1395217717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Together with 1534778955 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 1395217845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4457409 + ... + 4457721.

It is an arithmetic number, because the mean of its divisors is an integer number (22890600).

Almost surely, 2^1395217845 is an apocalyptic number.

1395217845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1395217845 is an abundant number, since it is smaller than the sum of its proper divisors (1534778955).

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

1395217845 is a wasteful number, since it uses less digits than its factorization.

1395217845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 470 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1395217845 is about 37352.6149687007. The cubic root of 1395217845 is about 1117.4137404703.

The spelling of 1395217845 in words is "one billion, three hundred ninety-five million, two hundred seventeen thousand, eight hundred forty-five".