245142455 has 4 divisors (see below), whose sum is σ = 294170952. Its totient is φ = 196113960.

The previous prime is 245142449. The next prime is 245142461. The reversal of 245142455 is 554241542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554241542 = 2 ⋅277120771.

It is an interprime number because it is at equal distance from previous prime (245142449) and next prime (245142461).

It is not a de Polignac number, because 245142455 - 2¹⁰ = 245141431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24514241 + ... + 24514250.

It is an arithmetic number, because the mean of its divisors is an integer number (73542738).

Almost surely, 2^245142455 is an apocalyptic number.

245142455 is a deficient number, since it is larger than the sum of its proper divisors (49028497).

245142455 is an equidigital number, since it uses as much as digits as its factorization.

245142455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49028496.

The product of its digits is 32000, while the sum is 32.

The square root of 245142455 is about 15657.0257392648. The cubic root of 245142455 is about 625.8537282393.

Adding to 245142455 its reverse (554241542), we get a palindrome (799383997).

The spelling of 245142455 in words is "two hundred forty-five million, one hundred forty-two thousand, four hundred fifty-five".