245891361 has 4 divisors (see below), whose sum is σ = 327855152. Its totient is φ = 163927572.

The previous prime is 245891351. The next prime is 245891419. The reversal of 245891361 is 163198542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 245891361 - 2⁹ = 245890849 is a prime.

It is a super-2 number, since 2×245891361² = 120925122828864642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245891311) 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, 40981891 + ... + 40981896.

It is an arithmetic number, because the mean of its divisors is an integer number (81963788).

Almost surely, 2^245891361 is an apocalyptic number.

It is an amenable number.

245891361 is a deficient number, since it is larger than the sum of its proper divisors (81963791).

245891361 is an equidigital number, since it uses as much as digits as its factorization.

245891361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81963790.

The product of its digits is 51840, while the sum is 39.

The square root of 245891361 is about 15680.9234740815. The cubic root of 245891361 is about 626.4904044728.

The spelling of 245891361 in words is "two hundred forty-five million, eight hundred ninety-one thousand, three hundred sixty-one".