245057971 has 4 divisors (see below), whose sum is σ = 246525552. Its totient is φ = 243590392.

The previous prime is 245057963. The next prime is 245058013. The reversal of 245057971 is 179750542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179750542 = 2 ⋅89875271.

It is a cyclic number.

It is not a de Polignac number, because 245057971 - 2³ = 245057963 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245051971) 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, 733540 + ... + 733873.

It is an arithmetic number, because the mean of its divisors is an integer number (61631388).

Almost surely, 2^245057971 is an apocalyptic number.

245057971 is a deficient number, since it is larger than the sum of its proper divisors (1467581).

245057971 is a wasteful number, since it uses less digits than its factorization.

245057971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467580.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 245057971 is about 15654.3275486365. The cubic root of 245057971 is about 625.7818235154.

The spelling of 245057971 in words is "two hundred forty-five million, fifty-seven thousand, nine hundred seventy-one".