2472821 has 16 divisors (see below), whose sum is σ = 2815344. Its totient is φ = 2156544.

The previous prime is 2472809. The next prime is 2472823. The reversal of 2472821 is 1282742.

It can be written as a sum of positive squares in 8 ways, for example, as 36100 + 2436721 = 190^2 + 1561^2 .

It is not a de Polignac number, because 2472821 - 2¹⁴ = 2456437 is a prime.

It is a super-2 number, since 2×2472821² = 12229687396082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2472823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25445 + ... + 25541.

It is an arithmetic number, because the mean of its divisors is an integer number (175959).

2^2472821 is an apocalyptic number.

It is an amenable number.

2472821 is a deficient number, since it is larger than the sum of its proper divisors (342523).

2472821 is a wasteful number, since it uses less digits than its factorization.

2472821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 1792, while the sum is 26.

The square root of 2472821 is about 1572.5205881005. The cubic root of 2472821 is about 135.2272532679.

The spelling of 2472821 in words is "two million, four hundred seventy-two thousand, eight hundred twenty-one".