2072421 has 12 divisors (see below), whose sum is σ = 3223948. Its totient is φ = 1275264.

The previous prime is 2072393. The next prime is 2072423. The reversal of 2072421 is 1242702.

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 893025 = 1086^2 + 945^2 .

It is not a de Polignac number, because 2072421 - 2⁷ = 2072293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2072394 and 2072403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2072423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8740 + ... + 8973.

2^2072421 is an apocalyptic number.

It is an amenable number.

2072421 is a deficient number, since it is larger than the sum of its proper divisors (1151527).

2072421 is a wasteful number, since it uses less digits than its factorization.

2072421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17732 (or 17729 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2072421 is about 1439.5905667932. The cubic root of 2072421 is about 127.4948556171.

It can be divided in two parts, 207 and 2421, that added together give a triangular number (2628 = T₇₂).

The spelling of 2072421 in words is "two million, seventy-two thousand, four hundred twenty-one".