1252665 has 24 divisors (see below), whose sum is σ = 2253888. Its totient is φ = 667440.

The previous prime is 1252663. The next prime is 1252681. The reversal of 1252665 is 5662521.

It is not a de Polignac number, because 1252665 - 2¹ = 1252663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 700 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (93912).

2^1252665 is an apocalyptic number.

1252665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252665 is a deficient number, since it is larger than the sum of its proper divisors (1001223).

1252665 is an equidigital number, since it uses as much as digits as its factorization.

1252665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1039 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1252665 is about 1119.2251784159. The cubic root of 1252665 is about 107.7982344074.

The spelling of 1252665 in words is "one million, two hundred fifty-two thousand, six hundred sixty-five".