1250005 has 12 divisors (see below), whose sum is σ = 1546020. Its totient is φ = 970112.

The previous prime is 1250003. The next prime is 1250009. The reversal of 1250005 is 5000521.

It can be written as a sum of positive squares in 6 ways, for example, as 81 + 1249924 = 9^2 + 1118^2 .

It is not a de Polignac number, because 1250005 - 2¹ = 1250003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1250003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14001 + ... + 14089.

It is an arithmetic number, because the mean of its divisors is an integer number (128835).

2^1250005 is an apocalyptic number.

It is an amenable number.

1250005 is a deficient number, since it is larger than the sum of its proper divisors (296015).

1250005 is an frugal number, since it uses more digits than its factorization.

1250005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 1250005 is about 1118.0362248156. The cubic root of 1250005 is about 107.7218781304.

Adding to 1250005 its reverse (5000521), we get a palindrome (6250526).

It can be divided in two parts, 12 and 50005, that multiplied together give a triangular number (600060 = T₁₀₉₅).

The spelling of 1250005 in words is "one million, two hundred fifty thousand, five".