245161771 has 4 divisors (see below), whose sum is σ = 245889592. Its totient is φ = 244433952.

The previous prime is 245161757. The next prime is 245161781. The reversal of 245161771 is 177161542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245161771 - 2⁵ = 245161739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245161711) 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, 363405 + ... + 364078.

It is an arithmetic number, because the mean of its divisors is an integer number (61472398).

Almost surely, 2^245161771 is an apocalyptic number.

245161771 is a deficient number, since it is larger than the sum of its proper divisors (727821).

245161771 is an equidigital number, since it uses as much as digits as its factorization.

245161771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727820.

The product of its digits is 11760, while the sum is 34.

The square root of 245161771 is about 15657.6425747939. The cubic root of 245161771 is about 625.8701658560.

The spelling of 245161771 in words is "two hundred forty-five million, one hundred sixty-one thousand, seven hundred seventy-one".