2151154 has 4 divisors (see below), whose sum is σ = 3226734. Its totient is φ = 1075576.

The previous prime is 2151139. The next prime is 2151157. The reversal of 2151154 is 4511512.

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., 1896129 + 255025 = 1377^2 + 505^2 .

It is not an unprimeable number, because it can be changed into a prime (2151157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537787 + ... + 537790.

2^2151154 is an apocalyptic number.

2151154 is a deficient number, since it is larger than the sum of its proper divisors (1075580).

2151154 is a wasteful number, since it uses less digits than its factorization.

2151154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075579.

The product of its digits is 200, while the sum is 19.

The square root of 2151154 is about 1466.6812878059. The cubic root of 2151154 is about 129.0893757971.

Adding to 2151154 its reverse (4511512), we get a palindrome (6662666).

It can be divided in two parts, 215 and 1154, that added together give a square (1369 = 37²).

The spelling of 2151154 in words is "two million, one hundred fifty-one thousand, one hundred fifty-four".