2150421 has 16 divisors (see below), whose sum is σ = 3529344. Its totient is φ = 1134144.

The previous prime is 2150419. The next prime is 2150441. The reversal of 2150421 is 1240512.

It is not a de Polignac number, because 2150421 - 2¹ = 2150419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2150421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3666 + ... + 4211.

It is an arithmetic number, because the mean of its divisors is an integer number (220584).

2^2150421 is an apocalyptic number.

2150421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2150421 is a deficient number, since it is larger than the sum of its proper divisors (1378923).

2150421 is a wasteful number, since it uses less digits than its factorization.

2150421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2150421 is about 1466.4313826429. The cubic root of 2150421 is about 129.0747118443.

Adding to 2150421 its reverse (1240512), we get a palindrome (3390933).

Subtracting from 2150421 its reverse (1240512), we obtain a palindrome (909909).

It can be divided in two parts, 21504 and 21, that multiplied together give a square (451584 = 672²).

The spelling of 2150421 in words is "two million, one hundred fifty thousand, four hundred twenty-one".