2147240 has 16 divisors (see below), whose sum is σ = 4831380. Its totient is φ = 858880.

The previous prime is 2147237. The next prime is 2147251. The reversal of 2147240 is 427412.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 33124 = 1454^2 + 182^2 .

It is a super-2 number, since 2×2147240² = 9221279235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 4⁴ + 7⁵ + 2²¹ + 4⁴ + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26801 + ... + 26880.

2^2147240 is an apocalyptic number.

2147240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2147240 is an abundant number, since it is smaller than the sum of its proper divisors (2684140).

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

2147240 is a wasteful number, since it uses less digits than its factorization.

2147240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53692 (or 53688 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 2147240 is about 1465.3463754348. The cubic root of 2147240 is about 129.0110360528.

It can be divided in two parts, 21472 and 40, that added together give a palindrome (21512).

The spelling of 2147240 in words is "two million, one hundred forty-seven thousand, two hundred forty".