245140277 has 4 divisors (see below), whose sum is σ = 253593420. Its totient is φ = 236687136.

The previous prime is 245140249. The next prime is 245140303. The reversal of 245140277 is 772041542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 772041542 = 2 ⋅386020771.

It can be written as a sum of positive squares in 2 ways, for example, as 146555236 + 98585041 = 12106^2 + 9929^2 .

It is a cyclic number.

It is not a de Polignac number, because 245140277 - 2⁶ = 245140213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245140177) 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, 4226528 + ... + 4226585.

It is an arithmetic number, because the mean of its divisors is an integer number (63398355).

Almost surely, 2^245140277 is an apocalyptic number.

It is an amenable number.

245140277 is a deficient number, since it is larger than the sum of its proper divisors (8453143).

245140277 is an equidigital number, since it uses as much as digits as its factorization.

245140277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8453142.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 245140277 is about 15656.9561856703. The cubic root of 245140277 is about 625.8518747409.

The spelling of 245140277 in words is "two hundred forty-five million, one hundred forty thousand, two hundred seventy-seven".