2151434 has 8 divisors (see below), whose sum is σ = 3305988. Its totient is φ = 1049440.

The previous prime is 2151433. The next prime is 2151451. The reversal of 2151434 is 4341512.

It can be written as a sum of positive squares in 2 ways, for example, as 1682209 + 469225 = 1297^2 + 685^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151433) 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 3 ways as a sum of consecutive naturals, for example, 13037 + ... + 13200.

2^2151434 is an apocalyptic number.

2151434 is a deficient number, since it is larger than the sum of its proper divisors (1154554).

2151434 is a wasteful number, since it uses less digits than its factorization.

2151434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26280.

The product of its digits is 480, while the sum is 20.

The square root of 2151434 is about 1466.7767382939. The cubic root of 2151434 is about 129.0949764277.

Adding to 2151434 its reverse (4341512), we get a palindrome (6492946).

The spelling of 2151434 in words is "two million, one hundred fifty-one thousand, four hundred thirty-four".