1245971 has 2 divisors, whose sum is σ = 1245972. Its totient is φ = 1245970.

The previous prime is 1245961. The next prime is 1245973. The reversal of 1245971 is 1795421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245971 is a prime.

Together with 1245973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622985 + 622986.

It is an arithmetic number, because the mean of its divisors is an integer number (622986).

2^1245971 is an apocalyptic number.

1245971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245971 is an equidigital number, since it uses as much as digits as its factorization.

1245971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 1245971 is about 1116.2307109196. The cubic root of 1245971 is about 107.6058736999.

The spelling of 1245971 in words is "one million, two hundred forty-five thousand, nine hundred seventy-one".