245587481 has 2 divisors, whose sum is σ = 245587482. Its totient is φ = 245587480.

The previous prime is 245587471. The next prime is 245587493. The reversal of 245587481 is 184785542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228281881 + 17305600 = 15109^2 + 4160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245587481 is a prime.

It is a super-2 number, since 2×245587481² = 120626421647850722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245587411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122793740 + 122793741.

It is an arithmetic number, because the mean of its divisors is an integer number (122793741).

Almost surely, 2^245587481 is an apocalyptic number.

It is an amenable number.

245587481 is a deficient number, since it is larger than the sum of its proper divisors (1).

245587481 is an equidigital number, since it uses as much as digits as its factorization.

245587481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 358400, while the sum is 44.

The square root of 245587481 is about 15671.2309982337. The cubic root of 245587481 is about 626.2322194731.

The spelling of 245587481 in words is "two hundred forty-five million, five hundred eighty-seven thousand, four hundred eighty-one".