1253457 has 6 divisors (see below), whose sum is σ = 1810562. Its totient is φ = 835632.

The previous prime is 1253453. The next prime is 1253471. The reversal of 1253457 is 7543521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 1296 = 1119^2 + 36^2 .

It is not a de Polignac number, because 1253457 - 2² = 1253453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253457.

It is not an unprimeable number, because it can be changed into a prime (1253453) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 69628 + ... + 69645.

2^1253457 is an apocalyptic number.

It is an amenable number.

1253457 is a deficient number, since it is larger than the sum of its proper divisors (557105).

1253457 is a wasteful number, since it uses less digits than its factorization.

1253457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139279 (or 139276 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 1253457 is about 1119.5789387087. The cubic root of 1253457 is about 107.8209481723.

Adding to 1253457 its reverse (7543521), we get a palindrome (8796978).

Subtracting 1253457 from its reverse (7543521), we obtain a square (6290064 = 2508²).

The spelling of 1253457 in words is "one million, two hundred fifty-three thousand, four hundred fifty-seven".