245654281 has 4 divisors (see below), whose sum is σ = 247908100. Its totient is φ = 243400464.

The previous prime is 245654263. The next prime is 245654309. The reversal of 245654281 is 182456542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182456542 = 2 ⋅91228271.

It can be written as a sum of positive squares in 2 ways, for example, as 56866681 + 188787600 = 7541^2 + 13740^2 .

It is a cyclic number.

It is not a de Polignac number, because 245654281 - 2⁷ = 245654153 is a prime.

It is a super-2 number, since 2×245654281² = 120692051547253922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245654281.

It is not an unprimeable number, because it can be changed into a prime (245654251) 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, 1126746 + ... + 1126963.

It is an arithmetic number, because the mean of its divisors is an integer number (61977025).

Almost surely, 2^245654281 is an apocalyptic number.

It is an amenable number.

245654281 is a deficient number, since it is larger than the sum of its proper divisors (2253819).

245654281 is a wasteful number, since it uses less digits than its factorization.

245654281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253818.

The product of its digits is 76800, while the sum is 37.

The square root of 245654281 is about 15673.3621472867. The cubic root of 245654281 is about 626.2889928882.

The spelling of 245654281 in words is "two hundred forty-five million, six hundred fifty-four thousand, two hundred eighty-one".