245400245 has 4 divisors (see below), whose sum is σ = 294480300. Its totient is φ = 196320192.

The previous prime is 245400241. The next prime is 245400277. The reversal of 245400245 is 542004542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542004542 = 2 ⋅271002271.

It can be written as a sum of positive squares in 2 ways, for example, as 26152996 + 219247249 = 5114^2 + 14807^2 .

It is a cyclic number.

It is not a de Polignac number, because 245400245 - 2² = 245400241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245400241) 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, 24540020 + ... + 24540029.

It is an arithmetic number, because the mean of its divisors is an integer number (73620075).

Almost surely, 2^245400245 is an apocalyptic number.

It is an amenable number.

245400245 is a deficient number, since it is larger than the sum of its proper divisors (49080055).

245400245 is an equidigital number, since it uses as much as digits as its factorization.

245400245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49080054.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 245400245 is about 15665.2559825877. The cubic root of 245400245 is about 626.0730324413.

Adding to 245400245 its reverse (542004542), we get a palindrome (787404787).

The spelling of 245400245 in words is "two hundred forty-five million, four hundred thousand, two hundred forty-five".