1255405547 has 4 divisors (see below), whose sum is σ = 1369533336. Its totient is φ = 1141277760.

The previous prime is 1255405537. The next prime is 1255405553. The reversal of 1255405547 is 7455045521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255405547 - 2²⁴ = 1238628331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255405547.

It is not an unprimeable number, because it can be changed into a prime (1255405507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57063878 + ... + 57063899.

It is an arithmetic number, because the mean of its divisors is an integer number (342383334).

Almost surely, 2^1255405547 is an apocalyptic number.

1255405547 is a deficient number, since it is larger than the sum of its proper divisors (114127789).

1255405547 is a wasteful number, since it uses less digits than its factorization.

1255405547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114127788.

The product of its (nonzero) digits is 140000, while the sum is 38.

The square root of 1255405547 is about 35431.7025698738. The cubic root of 1255405547 is about 1078.7678984654.

The spelling of 1255405547 in words is "one billion, two hundred fifty-five million, four hundred five thousand, five hundred forty-seven".