1283925555 has 144 divisors (see below), whose sum is σ = 2599309440. Its totient is φ = 584855040.

The previous prime is 1283925541. The next prime is 1283925571. The reversal of 1283925555 is 5555293821.

It is a happy number.

1283925555 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 92 + 5 + 555 = 666.

It is not a de Polignac number, because 1283925555 - 2⁸ = 1283925299 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1283925555.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7421449 + ... + 7421621.

It is an arithmetic number, because the mean of its divisors is an integer number (18050760).

Almost surely, 2^1283925555 is an apocalyptic number.

1283925555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1283925555 is an abundant number, since it is smaller than the sum of its proper divisors (1315383885).

1283925555 is a wasteful number, since it uses less digits than its factorization.

1283925555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 268 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The square root of 1283925555 is about 35831.9069406025. The cubic root of 1283925555 is about 1086.8758717595.

The spelling of 1283925555 in words is "one billion, two hundred eighty-three million, nine hundred twenty-five thousand, five hundred fifty-five".