2151594 has 12 divisors (see below), whose sum is σ = 4661826. Its totient is φ = 717192.

The previous prime is 2151593. The next prime is 2151607. The reversal of 2151594 is 4951512.

2151594 is a `hidden beast` number, since 21 + 51 + 594 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1863225 + 288369 = 1365^2 + 537^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2151593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59749 + ... + 59784.

2^2151594 is an apocalyptic number.

2151594 is an abundant number, since it is smaller than the sum of its proper divisors (2510232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151594 is a wasteful number, since it uses less digits than its factorization.

2151594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119541 (or 119538 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 2151594 is about 1466.8312786411. The cubic root of 2151594 is about 129.0981765699.

It can be divided in two parts, 21515 and 94, that added together give a square (21609 = 147²).

The spelling of 2151594 in words is "two million, one hundred fifty-one thousand, five hundred ninety-four".