2101562 has 4 divisors (see below), whose sum is σ = 3152346. Its totient is φ = 1050780.

The previous prime is 2101553. The next prime is 2101607. The reversal of 2101562 is 2651012.

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., 1985281 + 116281 = 1409^2 + 341^2 .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2101562.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 525389 + ... + 525392.

2^2101562 is an apocalyptic number.

2101562 is a deficient number, since it is larger than the sum of its proper divisors (1050784).

2101562 is a wasteful number, since it uses less digits than its factorization.

2101562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050783.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2101562 is about 1449.6765156406. The cubic root of 2101562 is about 128.0896588626.

Adding to 2101562 its reverse (2651012), we get a palindrome (4752574).

The spelling of 2101562 in words is "two million, one hundred one thousand, five hundred sixty-two".