2011145 has 8 divisors (see below), whose sum is σ = 2424840. Its totient is φ = 1601280.

The previous prime is 2011129. The next prime is 2011147. The reversal of 2011145 is 5411102.

It can be written as a sum of positive squares in 4 ways, for example, as 413449 + 1597696 = 643^2 + 1264^2 .

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

It is not a de Polignac number, because 2011145 - 2⁴ = 2011129 is a prime.

It is a super-2 number, since 2×2011145² = 8089408422050, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 2039.

It is an arithmetic number, because the mean of its divisors is an integer number (303105).

2^2011145 is an apocalyptic number.

It is an amenable number.

2011145 is a deficient number, since it is larger than the sum of its proper divisors (413695).

2011145 is a wasteful number, since it uses less digits than its factorization.

2011145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2011145 is about 1418.1484407494. The cubic root of 2011145 is about 126.2257019540.

Adding to 2011145 its reverse (5411102), we get a palindrome (7422247).

The spelling of 2011145 in words is "two million, eleven thousand, one hundred forty-five".