2445005261 has 2 divisors, whose sum is σ = 2445005262. Its totient is φ = 2445005260.

The previous prime is 2445005257. The next prime is 2445005267. The reversal of 2445005261 is 1625005442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2156209225 + 288796036 = 46435^2 + 16994^2 .

It is a cyclic number.

It is not a de Polignac number, because 2445005261 - 2² = 2445005257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2445005267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222502630 + 1222502631.

It is an arithmetic number, because the mean of its divisors is an integer number (1222502631).

Almost surely, 2^2445005261 is an apocalyptic number.

It is an amenable number.

2445005261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2445005261 is an equidigital number, since it uses as much as digits as its factorization.

2445005261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 2445005261 is about 49446.9944587131. The cubic root of 2445005261 is about 1347.1830169199.

The spelling of 2445005261 in words is "two billion, four hundred forty-five million, five thousand, two hundred sixty-one".