245738149 has 4 divisors (see below), whose sum is σ = 246285900. Its totient is φ = 245190400.

The previous prime is 245738123. The next prime is 245738161. The reversal of 245738149 is 941837542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941837542 = 2 ⋅470918771.

It can be written as a sum of positive squares in 2 ways, for example, as 128709025 + 117029124 = 11345^2 + 10818^2 .

It is a cyclic number.

It is not a de Polignac number, because 245738149 - 2⁷ = 245738021 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 (245738189) 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, 273202 + ... + 274099.

It is an arithmetic number, because the mean of its divisors is an integer number (61571475).

Almost surely, 2^245738149 is an apocalyptic number.

It is an amenable number.

245738149 is a deficient number, since it is larger than the sum of its proper divisors (547751).

245738149 is an equidigital number, since it uses as much as digits as its factorization.

245738149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547750.

The product of its digits is 241920, while the sum is 43.

The square root of 245738149 is about 15676.0374138364. The cubic root of 245738149 is about 626.3602578500.

The spelling of 245738149 in words is "two hundred forty-five million, seven hundred thirty-eight thousand, one hundred forty-nine".