1385581145 has 24 divisors (see below), whose sum is σ = 1830019032. Its totient is φ = 1006387200.

The previous prime is 1385581133. The next prime is 1385581151. The reversal of 1385581145 is 5411855831.

It can be written as a sum of positive squares in 12 ways, for example, as 993699529 + 391881616 = 31523^2 + 19796^2 .

It is not a de Polignac number, because 1385581145 - 2⁴ = 1385581129 is a prime.

It is a super-2 number, since 2×1385581145² = 3839670218759022050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38105 + ... + 64985.

It is an arithmetic number, because the mean of its divisors is an integer number (76250793).

Almost surely, 2^1385581145 is an apocalyptic number.

It is an amenable number.

1385581145 is a deficient number, since it is larger than the sum of its proper divisors (444437887).

1385581145 is a wasteful number, since it uses less digits than its factorization.

1385581145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26973 (or 26960 counting only the distinct ones).

The product of its digits is 96000, while the sum is 41.

The square root of 1385581145 is about 37223.3951299448. The cubic root of 1385581145 is about 1114.8351542982.

The spelling of 1385581145 in words is "one billion, three hundred eighty-five million, five hundred eighty-one thousand, one hundred forty-five".