1260240 has 80 divisors (see below), whose sum is σ = 4017600. Its totient is φ = 326656.

The previous prime is 1260223. The next prime is 1260269. The reversal of 1260240 is 420621.

Added to its reverse (420621) it gives a triangular number (1680861 = T₁₈₃₃).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14116 + ... + 14204.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2^1260240 is an apocalyptic number.

1260240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1260240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008800).

1260240 is an abundant number, since it is smaller than the sum of its proper divisors (2757360).

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

1260240 is a wasteful number, since it uses less digits than its factorization.

1260240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1260240 is about 1122.6041154387. The cubic root of 1260240 is about 108.0150870556.

Adding to 1260240 its reverse (420621), we get a palindrome (1680861).

The spelling of 1260240 in words is "one million, two hundred sixty thousand, two hundred forty".