1255051505 has 4 divisors (see below), whose sum is σ = 1506061812. Its totient is φ = 1004041200.

The previous prime is 1255051489. The next prime is 1255051547. The reversal of 1255051505 is 5051505521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 516516529 + 738534976 = 22727^2 + 27176^2 .

It is not a de Polignac number, because 1255051505 - 2⁴ = 1255051489 is a prime.

It is a super-4 number, since 4×1255051505⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125505146 + ... + 125505155.

It is an arithmetic number, because the mean of its divisors is an integer number (376515453).

Almost surely, 2^1255051505 is an apocalyptic number.

It is an amenable number.

1255051505 is a deficient number, since it is larger than the sum of its proper divisors (251010307).

1255051505 is an equidigital number, since it uses as much as digits as its factorization.

1255051505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251010306.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 1255051505 is about 35426.7060986482. The cubic root of 1255051505 is about 1078.6664796970. Note that the first 3 decimals are identical.

The spelling of 1255051505 in words is "one billion, two hundred fifty-five million, fifty-one thousand, five hundred five".