2151454 has 4 divisors (see below), whose sum is σ = 3227184. Its totient is φ = 1075726.

The previous prime is 2151451. The next prime is 2151463. The reversal of 2151454 is 4541512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537862 + ... + 537865.

It is an arithmetic number, because the mean of its divisors is an integer number (806796).

2^2151454 is an apocalyptic number.

2151454 is a deficient number, since it is larger than the sum of its proper divisors (1075730).

2151454 is a wasteful number, since it uses less digits than its factorization.

2151454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075729.

The product of its digits is 800, while the sum is 22.

The square root of 2151454 is about 1466.7835559482. The cubic root of 2151454 is about 129.0953764542.

Adding to 2151454 its reverse (4541512), we get a palindrome (6692966).

The spelling of 2151454 in words is "two million, one hundred fifty-one thousand, four hundred fifty-four".