2001554 has 4 divisors (see below), whose sum is σ = 3002334. Its totient is φ = 1000776.

The previous prime is 2001553. The next prime is 2001581. The reversal of 2001554 is 4551002.

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., 1385329 + 616225 = 1177^2 + 785^2 .

2001554 is a modest number, since divided by 1554 gives 2 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2001553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500387 + ... + 500390.

2^2001554 is an apocalyptic number.

2001554 is a deficient number, since it is larger than the sum of its proper divisors (1000780).

2001554 is a wasteful number, since it uses less digits than its factorization.

2001554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000779.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2001554 is about 1414.7628776583. The cubic root of 2001554 is about 126.0247284966.

Adding to 2001554 its reverse (4551002), we get a palindrome (6552556).

The spelling of 2001554 in words is "two million, one thousand, five hundred fifty-four".