1252635 has 24 divisors (see below), whose sum is σ = 2093616. Its totient is φ = 639360.

The previous prime is 1252631. The next prime is 1252639. The reversal of 1252635 is 5362521.

It is an interprime number because it is at equal distance from previous prime (1252631) and next prime (1252639).

It is not a de Polignac number, because 1252635 - 2² = 1252631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252631) 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, 20505 + ... + 20565.

It is an arithmetic number, because the mean of its divisors is an integer number (87234).

2^1252635 is an apocalyptic number.

1252635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252635 is a deficient number, since it is larger than the sum of its proper divisors (840981).

1252635 is an equidigital number, since it uses as much as digits as its factorization.

1252635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 106 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 1252635 is about 1119.2117762068. The cubic root of 1252635 is about 107.7973738493.

It can be divided in two parts, 12526 and 35, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 1252635 in words is "one million, two hundred fifty-two thousand, six hundred thirty-five".