2578001247 has 6 divisors (see below), whose sum is σ = 3723779592. Its totient is φ = 1718667492.

The previous prime is 2578001243. The next prime is 2578001287. The reversal of 2578001247 is 7421008752.

It is not a de Polignac number, because 2578001247 - 2² = 2578001243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578001243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143222283 + ... + 143222300.

It is an arithmetic number, because the mean of its divisors is an integer number (620629932).

Almost surely, 2^2578001247 is an apocalyptic number.

2578001247 is a deficient number, since it is larger than the sum of its proper divisors (1145778345).

2578001247 is a wasteful number, since it uses less digits than its factorization.

2578001247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286444589 (or 286444586 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 2578001247 is about 50774.0213790478. The cubic root of 2578001247 is about 1371.1796979990.

Adding to 2578001247 its reverse (7421008752), we get a palindrome (9999009999).

The spelling of 2578001247 in words is "two billion, five hundred seventy-eight million, one thousand, two hundred forty-seven".