1255405545 has 24 divisors (see below), whose sum is σ = 2304039816. Its totient is φ = 630163968.

The previous prime is 1255405537. The next prime is 1255405553. The reversal of 1255405545 is 5455045521.

1255405545 is a `hidden beast` number, since 1 + 25 + 540 + 55 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (1255405537) and next prime (1255405553).

It can be written as a sum of positive squares in 4 ways, for example, as 298183824 + 957221721 = 17268^2 + 30939^2 .

It is not a de Polignac number, because 1255405545 - 2³ = 1255405537 is a prime.

It is a hoax number, since the sum of its digits (36) 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, 819762 + ... + 821291.

It is an arithmetic number, because the mean of its divisors is an integer number (96001659).

Almost surely, 2^1255405545 is an apocalyptic number.

1255405545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255405545 is a deficient number, since it is larger than the sum of its proper divisors (1048634271).

1255405545 is a wasteful number, since it uses less digits than its factorization.

1255405545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641081 (or 1641078 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The square root of 1255405545 is about 35431.7025416505. The cubic root of 1255405545 is about 1078.7678978925.

The spelling of 1255405545 in words is "one billion, two hundred fifty-five million, four hundred five thousand, five hundred forty-five".