245123407 has 2 divisors, whose sum is σ = 245123408. Its totient is φ = 245123406.

The previous prime is 245123393. The next prime is 245123423. The reversal of 245123407 is 704321542.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245123407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245123497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122561703 + 122561704.

It is an arithmetic number, because the mean of its divisors is an integer number (122561704).

Almost surely, 2^245123407 is an apocalyptic number.

245123407 is a deficient number, since it is larger than the sum of its proper divisors (1).

245123407 is an equidigital number, since it uses as much as digits as its factorization.

245123407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 245123407 is about 15656.4174382264. The cubic root of 245123407 is about 625.8375178409.

Adding to 245123407 its reverse (704321542), we get a palindrome (949444949).

The spelling of 245123407 in words is "two hundred forty-five million, one hundred twenty-three thousand, four hundred seven".