2151472 has 20 divisors (see below), whose sum is σ = 4258656. Its totient is φ = 1052480.

The previous prime is 2151467. The next prime is 2151473. The reversal of 2151472 is 2741512.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2151473) 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, 679 + ... + 2182.

2^2151472 is an apocalyptic number.

It is an amenable number.

2151472 is a deficient number, since it is larger than the sum of its proper divisors (2107184).

2151472 is a wasteful number, since it uses less digits than its factorization.

2151472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2910 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 2151472 is about 1466.7896918100. The cubic root of 2151472 is about 129.0957364759.

Adding to 2151472 its reverse (2741512), we get a palindrome (4892984).

The spelling of 2151472 in words is "two million, one hundred fifty-one thousand, four hundred seventy-two".