13261240 has 32 divisors (see below), whose sum is σ = 31410000. Its totient is φ = 5025024.

The previous prime is 13261231. The next prime is 13261277. The reversal of 13261240 is 4216231.

13261240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7965 + ... + 9484.

Almost surely, 2^13261240 is an apocalyptic number.

13261240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13261240 is an abundant number, since it is smaller than the sum of its proper divisors (18148760).

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

13261240 is a wasteful number, since it uses less digits than its factorization.

13261240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17479 (or 17475 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 13261240 is about 3641.5985500876. The cubic root of 13261240 is about 236.6980672040.

Adding to 13261240 its reverse (4216231), we get a palindrome (17477471).

The spelling of 13261240 in words is "thirteen million, two hundred sixty-one thousand, two hundred forty".