245739457 has 2 divisors, whose sum is σ = 245739458. Its totient is φ = 245739456.

The previous prime is 245739443. The next prime is 245739479. The reversal of 245739457 is 754937542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236882881 + 8856576 = 15391^2 + 2976^2 .

It is a cyclic number.

It is not a de Polignac number, because 245739457 - 2¹¹ = 245737409 is a prime.

It is not a weakly prime, because it can be changed into another prime (245739757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122869728 + 122869729.

It is an arithmetic number, because the mean of its divisors is an integer number (122869729).

Almost surely, 2^245739457 is an apocalyptic number.

It is an amenable number.

245739457 is a deficient number, since it is larger than the sum of its proper divisors (1).

245739457 is an equidigital number, since it uses as much as digits as its factorization.

245739457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The square root of 245739457 is about 15676.0791335078. The cubic root of 245739457 is about 626.3613691654.

It can be divided in two parts, 2457 and 39457, that added together give a palindrome (41914).

The spelling of 245739457 in words is "two hundred forty-five million, seven hundred thirty-nine thousand, four hundred fifty-seven".