2051290 has 8 divisors (see below), whose sum is σ = 3692340. Its totient is φ = 820512.

The previous prime is 2051281. The next prime is 2051311. The reversal of 2051290 is 921502.

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 253009 = 1341^2 + 503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102555 + ... + 102574.

2^2051290 is an apocalyptic number.

2051290 is a deficient number, since it is larger than the sum of its proper divisors (1641050).

2051290 is a wasteful number, since it uses less digits than its factorization.

2051290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205136.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2051290 is about 1432.2325230213. The cubic root of 2051290 is about 127.0600497222.

Adding to 2051290 its reverse (921502), we get a palindrome (2972792).

It can be divided in two parts, 20512 and 90, that added together give a palindrome (20602).

The spelling of 2051290 in words is "two million, fifty-one thousand, two hundred ninety".