2151634 has 16 divisors (see below), whose sum is σ = 3345408. Its totient is φ = 1037232.

The previous prime is 2151629. The next prime is 2151637. The reversal of 2151634 is 4361512.

It is not an unprimeable number, because it can be changed into a prime (2151637) 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, 10824 + ... + 11020.

It is an arithmetic number, because the mean of its divisors is an integer number (209088).

2^2151634 is an apocalyptic number.

2151634 is a deficient number, since it is larger than the sum of its proper divisors (1193774).

2151634 is a wasteful number, since it uses less digits than its factorization.

2151634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369.

The product of its digits is 720, while the sum is 22.

The square root of 2151634 is about 1466.8449134111. The cubic root of 2151634 is about 129.0989765807.

It can be divided in two parts, 215 and 1634, that added together give a square (1849 = 43²).

The spelling of 2151634 in words is "two million, one hundred fifty-one thousand, six hundred thirty-four".