2520642437 has 2 divisors, whose sum is σ = 2520642438. Its totient is φ = 2520642436.

The previous prime is 2520642409. The next prime is 2520642463. The reversal of 2520642437 is 7342460252.

It is a Cunningham number, because it is equal to 50206²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2520642436 + 1 = 50206^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520642437 - 2⁶ = 2520642373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2520642397 and 2520642406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520642637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260321218 + 1260321219.

It is an arithmetic number, because the mean of its divisors is an integer number (1260321219).

Almost surely, 2^2520642437 is an apocalyptic number.

It is an amenable number.

2520642437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520642437 is an equidigital number, since it uses as much as digits as its factorization.

2520642437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 2520642437 is about 50206.0000099590. Note that the first 5 decimals coincide. The cubic root of 2520642437 is about 1360.9340535907.

The spelling of 2520642437 in words is "two billion, five hundred twenty million, six hundred forty-two thousand, four hundred thirty-seven".