245406149 has 6 divisors (see below), whose sum is σ = 253955730. Its totient is φ = 236862416.

The previous prime is 245406131. The next prime is 245406151. The reversal of 245406149 is 941604542.

It can be written as a sum of positive squares in 3 ways, for example, as 130530625 + 114875524 = 11425^2 + 10718^2 .

It is not a de Polignac number, because 245406149 - 2⁸ = 245405893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245406449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82907 + ... + 85815.

It is an arithmetic number, because the mean of its divisors is an integer number (42325955).

Almost surely, 2^245406149 is an apocalyptic number.

245406149 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

245406149 is a deficient number, since it is larger than the sum of its proper divisors (8549581).

245406149 is an frugal number, since it uses more digits than its factorization.

245406149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 245406149 is about 15665.4444239543. Note that the first 4 decimals coincide. The cubic root of 245406149 is about 626.0780532262.

The spelling of 245406149 in words is "two hundred forty-five million, four hundred six thousand, one hundred forty-nine".