511240 has 16 divisors (see below), whose sum is σ = 1150380. Its totient is φ = 204480.

The previous prime is 511237. The next prime is 511243. The reversal of 511240 is 42115.

It is an interprime number because it is at equal distance from previous prime (511237) and next prime (511243).

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 1444 = 714^2 + 38^2 .

It is a super-2 number, since 2×511240² = 522732675200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511240.

It is not an unprimeable number, because it can be changed into a prime (511243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6351 + ... + 6430.

2⁵¹¹²⁴⁰ is an apocalyptic number.

It is an amenable number.

511240 is an abundant number, since it is smaller than the sum of its proper divisors (639140).

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

511240 is a wasteful number, since it uses less digits than its factorization.

511240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12792 (or 12788 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 511240 is about 715.0104894335. The cubic root of 511240 is about 79.9603970650.

Adding to 511240 its reverse (42115), we get a palindrome (553355).

It can be divided in two parts, 5112 and 40, that multiplied together give a triangular number (204480 = T₆₃₉).

The spelling of 511240 in words is "five hundred eleven thousand, two hundred forty".