1255000251 has 16 divisors (see below), whose sum is σ = 1715793408. Its totient is φ = 815580000.

The previous prime is 1255000237. The next prime is 1255000273. The reversal of 1255000251 is 1520005521.

It is not a de Polignac number, because 1255000251 - 2¹³ = 1254992059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1255000051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17661 + ... + 53121.

It is an arithmetic number, because the mean of its divisors is an integer number (107237088).

Almost surely, 2^1255000251 is an apocalyptic number.

1255000251 is a deficient number, since it is larger than the sum of its proper divisors (460793157).

1255000251 is a wasteful number, since it uses less digits than its factorization.

1255000251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35762.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1255000251 is about 35425.9827104344. The cubic root of 1255000251 is about 1078.6517959107.

Adding to 1255000251 its reverse (1520005521), we get a palindrome (2775005772).

The spelling of 1255000251 in words is "one billion, two hundred fifty-five million, two hundred fifty-one", and thus it is an aban number.