1251005 has 16 divisors (see below), whose sum is σ = 1772544. Its totient is φ = 829440.

The previous prime is 1250983. The next prime is 1251011. The reversal of 1251005 is 5001521.

It is not a de Polignac number, because 1251005 - 2⁸ = 1250749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509 + ... + 1661.

It is an arithmetic number, because the mean of its divisors is an integer number (110784).

2^1251005 is an apocalyptic number.

It is an amenable number.

1251005 is a deficient number, since it is larger than the sum of its proper divisors (521539).

1251005 is a wasteful number, since it uses less digits than its factorization.

1251005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1251005 is about 1118.4833481103. The cubic root of 1251005 is about 107.7505961929.

Adding to 1251005 its reverse (5001521), we get a palindrome (6252526).

The spelling of 1251005 in words is "one million, two hundred fifty-one thousand, five".