2128954 has 4 divisors (see below), whose sum is σ = 3193434. Its totient is φ = 1064476.

The previous prime is 2128933. The next prime is 2128963. The reversal of 2128954 is 4598212.

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., 1525225 + 603729 = 1235^2 + 777^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532237 + ... + 532240.

2^2128954 is an apocalyptic number.

2128954 is a deficient number, since it is larger than the sum of its proper divisors (1064480).

2128954 is a wasteful number, since it uses less digits than its factorization.

2128954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064479.

The product of its digits is 5760, while the sum is 31.

The square root of 2128954 is about 1459.0935542315. The cubic root of 2128954 is about 128.6437701061.

The spelling of 2128954 in words is "two million, one hundred twenty-eight thousand, nine hundred fifty-four".