1255954005 has 42 divisors (see below), whose sum is σ = 2263539606. Its totient is φ = 668701008.

The previous prime is 1255954001. The next prime is 1255954039. The reversal of 1255954005 is 5004595521.

1255954005 is a `hidden beast` number, since 1 + 25 + 595 + 40 + 0 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1004763204 + 251190801 = 31698^2 + 15849^2 .

It is not a de Polignac number, because 1255954005 - 2² = 1255954001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255954001) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 2139322 + ... + 2139908.

Almost surely, 2^1255954005 is an apocalyptic number.

1255954005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255954005 is a deficient number, since it is larger than the sum of its proper divisors (1007585601).

1255954005 is an frugal number, since it uses more digits than its factorization.

1255954005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1255954005 is about 35439.4413753942. The cubic root of 1255954005 is about 1078.9249719427.

It can be divided in two parts, 125595 and 4005, that added together give a square (129600 = 360²).

The spelling of 1255954005 in words is "one billion, two hundred fifty-five million, nine hundred fifty-four thousand, five".