245771249 has 4 divisors (see below), whose sum is σ = 245860836. Its totient is φ = 245681664.

The previous prime is 245771243. The next prime is 245771263. The reversal of 245771249 is 942177542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109348849 + 136422400 = 10457^2 + 11680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245771249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245771243) 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, 40544 + ... + 46209.

It is an arithmetic number, because the mean of its divisors is an integer number (61465209).

Almost surely, 2^245771249 is an apocalyptic number.

It is an amenable number.

245771249 is a deficient number, since it is larger than the sum of its proper divisors (89587).

245771249 is an equidigital number, since it uses as much as digits as its factorization.

245771249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89586.

The product of its digits is 141120, while the sum is 41.

The square root of 245771249 is about 15677.0931297865. The cubic root of 245771249 is about 626.3883793740.

The spelling of 245771249 in words is "two hundred forty-five million, seven hundred seventy-one thousand, two hundred forty-nine".