2136421 has 8 divisors (see below), whose sum is σ = 2453760. Its totient is φ = 1822128.

The previous prime is 2136419. The next prime is 2136437. The reversal of 2136421 is 1246312.

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

It is not a de Polignac number, because 2136421 - 2¹ = 2136419 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 3⁷ + 6³ + 4⁶ + 2²¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (306720).

2^2136421 is an apocalyptic number.

It is an amenable number.

2136421 is a deficient number, since it is larger than the sum of its proper divisors (317339).

2136421 is a wasteful number, since it uses less digits than its factorization.

2136421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its digits is 288, while the sum is 19.

The square root of 2136421 is about 1461.6500949270. The cubic root of 2136421 is about 128.7939944540.

The spelling of 2136421 in words is "two million, one hundred thirty-six thousand, four hundred twenty-one".