2425421 has 4 divisors (see below), whose sum is σ = 2465244. Its totient is φ = 2385600.

The previous prime is 2425417. The next prime is 2425429. The reversal of 2425421 is 1245242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1245242 = 2 ⋅622621.

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 2292196 = 365^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2425421 - 2² = 2425417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2425393 and 2425402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2425429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19820 + ... + 19941.

It is an arithmetic number, because the mean of its divisors is an integer number (616311).

2^2425421 is an apocalyptic number.

It is an amenable number.

2425421 is a deficient number, since it is larger than the sum of its proper divisors (39823).

2425421 is an equidigital number, since it uses as much as digits as its factorization.

2425421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39822.

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

The square root of 2425421 is about 1557.3763193268. The cubic root of 2425421 is about 134.3576434045.

The spelling of 2425421 in words is "two million, four hundred twenty-five thousand, four hundred twenty-one".