1283812145 has 64 divisors (see below), whose sum is σ = 1995079680. Its totient is φ = 769651200.

The previous prime is 1283812133. The next prime is 1283812157. The reversal of 1283812145 is 5412183821.

It is an interprime number because it is at equal distance from previous prime (1283812133) and next prime (1283812157).

It is not a de Polignac number, because 1283812145 - 2⁴ = 1283812129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3138701 + ... + 3139109.

It is an arithmetic number, because the mean of its divisors is an integer number (31173120).

Almost surely, 2^1283812145 is an apocalyptic number.

It is an amenable number.

1283812145 is a deficient number, since it is larger than the sum of its proper divisors (711267535).

1283812145 is a wasteful number, since it uses less digits than its factorization.

1283812145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 15360, while the sum is 35.

The square root of 1283812145 is about 35830.3243775437. The cubic root of 1283812145 is about 1086.8438693272.

Adding to 1283812145 its reverse (5412183821), we get a palindrome (6695995966).

The spelling of 1283812145 in words is "one billion, two hundred eighty-three million, eight hundred twelve thousand, one hundred forty-five".