1245271 has 4 divisors (see below), whose sum is σ = 1247832. Its totient is φ = 1242712.

The previous prime is 1245227. The next prime is 1245281. The reversal of 1245271 is 1725421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1725421 = 37 ⋅46633.

It is a cyclic number.

It is not a de Polignac number, because 1245271 - 2⁹ = 1244759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (311958).

2^1245271 is an apocalyptic number.

1245271 is a deficient number, since it is larger than the sum of its proper divisors (2561).

1245271 is an equidigital number, since it uses as much as digits as its factorization.

1245271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560.

The product of its digits is 560, while the sum is 22.

The square root of 1245271 is about 1115.9171116172. The cubic root of 1245271 is about 107.5857185433.

Adding to 1245271 its product of digits (560), we get a triangular number (1245831 = T₁₅₇₈).

The spelling of 1245271 in words is "one million, two hundred forty-five thousand, two hundred seventy-one".