2402500421 has 2 divisors, whose sum is σ = 2402500422. Its totient is φ = 2402500420.

The previous prime is 2402500409. The next prime is 2402500427. The reversal of 2402500421 is 1240052042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1718102500 + 684397921 = 41450^2 + 26161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402500421 - 2⁶ = 2402500357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2402500393 and 2402500402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2402500427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201250210 + 1201250211.

It is an arithmetic number, because the mean of its divisors is an integer number (1201250211).

Almost surely, 2^2402500421 is an apocalyptic number.

It is an amenable number.

2402500421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402500421 is an equidigital number, since it uses as much as digits as its factorization.

2402500421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2402500421 is about 49015.3080271868. The cubic root of 2402500421 is about 1339.3307010649.

Adding to 2402500421 its reverse (1240052042), we get a palindrome (3642552463).

The spelling of 2402500421 in words is "two billion, four hundred two million, five hundred thousand, four hundred twenty-one".