2478621 has 8 divisors (see below), whose sum is σ = 3315744. Its totient is φ = 1646960.

The previous prime is 2478611. The next prime is 2478631. The reversal of 2478621 is 1268742.

2478621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2478611) and next prime (2478631).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2478621 - 2⁵ = 2478589 is a prime.

It is a super-2 number, since 2×2478621² = 12287124123282, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150 + ... + 2231.

It is an arithmetic number, because the mean of its divisors is an integer number (414468).

2^2478621 is an apocalyptic number.

It is an amenable number.

2478621 is a deficient number, since it is larger than the sum of its proper divisors (837123).

2478621 is a wasteful number, since it uses less digits than its factorization.

2478621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731.

The product of its digits is 5376, while the sum is 30.

The square root of 2478621 is about 1574.3636809835. The cubic root of 2478621 is about 135.3328958601.

Adding to 2478621 its sum of digits (30), we get a triangular number (2478651 = T₂₂₂₆).

The spelling of 2478621 in words is "two million, four hundred seventy-eight thousand, six hundred twenty-one".