245172071 has 2 divisors, whose sum is σ = 245172072. Its totient is φ = 245172070.

The previous prime is 245172047. The next prime is 245172073. The reversal of 245172071 is 170271542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245172071 - 2⁶ = 245172007 is a prime.

Together with 245172073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245172073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122586035 + 122586036.

It is an arithmetic number, because the mean of its divisors is an integer number (122586036).

Almost surely, 2^245172071 is an apocalyptic number.

245172071 is a deficient number, since it is larger than the sum of its proper divisors (1).

245172071 is an equidigital number, since it uses as much as digits as its factorization.

245172071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 245172071 is about 15657.9714841994. The cubic root of 245172071 is about 625.8789306434.

The spelling of 245172071 in words is "two hundred forty-five million, one hundred seventy-two thousand, seventy-one".