11401540 has 12 divisors (see below), whose sum is σ = 23943276. Its totient is φ = 4560608.

The previous prime is 11401487. The next prime is 11401549. The reversal of 11401540 is 4510411.

It can be written as a sum of positive squares in 2 ways, for example, as 1679616 + 9721924 = 1296^2 + 3118^2 .

It is a super-2 number, since 2×11401540² = 259990228743200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11401549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285019 + ... + 285058.

It is an arithmetic number, because the mean of its divisors is an integer number (1995273).

Almost surely, 2^11401540 is an apocalyptic number.

11401540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11401540 is an abundant number, since it is smaller than the sum of its proper divisors (12541736).

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

11401540 is a wasteful number, since it uses less digits than its factorization.

11401540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570086 (or 570084 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 11401540 is about 3376.6166498434. The cubic root of 11401540 is about 225.0718453692.

Adding to 11401540 its reverse (4510411), we get a palindrome (15911951).

The spelling of 11401540 in words is "eleven million, four hundred one thousand, five hundred forty".