245651 has 8 divisors (see below), whose sum is σ = 295680. Its totient is φ = 199368.

The previous prime is 245639. The next prime is 245653. The reversal of 245651 is 156542.

245651 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245651 - 2⁶ = 245587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2²⁴⁵⁶⁵¹ is an apocalyptic number.

245651 is a deficient number, since it is larger than the sum of its proper divisors (50029).

245651 is a wasteful number, since it uses less digits than its factorization.

245651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873.

The product of its digits is 1200, while the sum is 23.

The square root of 245651 is about 495.6319198760. The cubic root of 245651 is about 62.6286204602.

The spelling of 245651 in words is "two hundred forty-five thousand, six hundred fifty-one".