245671 has 2 divisors, whose sum is σ = 245672. Its totient is φ = 245670.

The previous prime is 245653. The next prime is 245681. The reversal of 245671 is 176542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245671 - 2⁵ = 245639 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁸ + 6⁶ + 5 + 7⁴ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122835 + 122836.

It is an arithmetic number, because the mean of its divisors is an integer number (122836).

2²⁴⁵⁶⁷¹ is an apocalyptic number.

245671 is a deficient number, since it is larger than the sum of its proper divisors (1).

245671 is an equidigital number, since it uses as much as digits as its factorization.

245671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 245671 is about 495.6520957284. The cubic root of 245671 is about 62.6303200780.

The spelling of 245671 in words is "two hundred forty-five thousand, six hundred seventy-one".