2151450 has 72 divisors (see below), whose sum is σ = 6615648. Its totient is φ = 491040.

The previous prime is 2151433. The next prime is 2151451. The reversal of 2151450 is 541512.

2151450 is a `hidden beast` number, since 215 + 1 + 450 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2809 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (91884).

2^2151450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3307824).

2151450 is an abundant number, since it is smaller than the sum of its proper divisors (4464198).

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

2151450 is a wasteful number, since it uses less digits than its factorization.

2151450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2151450 is about 1466.7821924199. The cubic root of 2151450 is about 129.0952964491.

Adding to 2151450 its reverse (541512), we get a palindrome (2692962).

It can be divided in two parts, 2151 and 450, that added together give a square (2601 = 51²).

The spelling of 2151450 in words is "two million, one hundred fifty-one thousand, four hundred fifty".