245554405 has 4 divisors (see below), whose sum is σ = 294665292. Its totient is φ = 196443520.

The previous prime is 245554403. The next prime is 245554411. The reversal of 245554405 is 504455542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504455542 = 2 ⋅252227771.

It can be written as a sum of positive squares in 2 ways, for example, as 59259204 + 186295201 = 7698^2 + 13649^2 .

It is not a de Polignac number, because 245554405 - 2¹ = 245554403 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 (245554403) 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, 24555436 + ... + 24555445.

It is an arithmetic number, because the mean of its divisors is an integer number (73666323).

Almost surely, 2^245554405 is an apocalyptic number.

It is an amenable number.

245554405 is a deficient number, since it is larger than the sum of its proper divisors (49110887).

245554405 is an equidigital number, since it uses as much as digits as its factorization.

245554405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49110886.

The product of its (nonzero) digits is 80000, while the sum is 34.

The square root of 245554405 is about 15670.1756531317. The cubic root of 245554405 is about 626.2041043227.

The spelling of 245554405 in words is "two hundred forty-five million, five hundred fifty-four thousand, four hundred five".