2151458 has 4 divisors (see below), whose sum is σ = 3227190. Its totient is φ = 1075728.

The previous prime is 2151451. The next prime is 2151463. The reversal of 2151458 is 8541512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 97969 = 1433^2 + 313^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151451) 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 as a sum of consecutive naturals, namely, 537863 + ... + 537866.

2^2151458 is an apocalyptic number.

2151458 is a deficient number, since it is larger than the sum of its proper divisors (1075732).

2151458 is a wasteful number, since it uses less digits than its factorization.

2151458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075731.

The product of its digits is 1600, while the sum is 26.

The square root of 2151458 is about 1466.7849194752. The cubic root of 2151458 is about 129.0954564592.

The spelling of 2151458 in words is "two million, one hundred fifty-one thousand, four hundred fifty-eight".