1253445 has 8 divisors (see below), whose sum is σ = 2005536. Its totient is φ = 668496.

The previous prime is 1253437. The next prime is 1253453. The reversal of 1253445 is 5443521.

It is an interprime number because it is at equal distance from previous prime (1253437) and next prime (1253453).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253445 - 2³ = 1253437 is a prime.

It is a super-2 number, since 2×1253445² = 3142248736050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41767 + ... + 41796.

It is an arithmetic number, because the mean of its divisors is an integer number (250692).

2^1253445 is an apocalyptic number.

1253445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253445 is a deficient number, since it is larger than the sum of its proper divisors (752091).

1253445 is an equidigital number, since it uses as much as digits as its factorization.

1253445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83571.

The product of its digits is 2400, while the sum is 24.

The square root of 1253445 is about 1119.5735795382. The cubic root of 1253445 is about 107.8206040957.

Adding to 1253445 its reverse (5443521), we get a palindrome (6696966).

It can be divided in two parts, 125 and 3445, that added together give a triangular number (3570 = T₈₄).

The spelling of 1253445 in words is "one million, two hundred fifty-three thousand, four hundred forty-five".