2151234 has 12 divisors (see below), whose sum is σ = 4661046. Its totient is φ = 717072.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151234 is 4321512.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 205209 = 1395^2 + 453^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 119513 = 2151234 / (2 + 1 + 5 + 1 + 2 + 3 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59739 + ... + 59774.

2^2151234 is an apocalyptic number.

2151234 is an abundant number, since it is smaller than the sum of its proper divisors (2509812).

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

2151234 is a wasteful number, since it uses less digits than its factorization.

2151234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119521 (or 119518 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2151234 is about 1466.7085600077. The cubic root of 2151234 is about 129.0909760268.

Adding to 2151234 its reverse (4321512), we get a palindrome (6472746).

The spelling of 2151234 in words is "two million, one hundred fifty-one thousand, two hundred thirty-four".