11142840 has 32 divisors (see below), whose sum is σ = 33428880. Its totient is φ = 2971392.

The previous prime is 11142839. The next prime is 11142841. The reversal of 11142840 is 4824111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11142839) and next prime (11142841).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46309 + ... + 46548.

Almost surely, 2^11142840 is an apocalyptic number.

11142840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11142840 is an abundant number, since it is smaller than the sum of its proper divisors (22286040).

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

11142840 is a wasteful number, since it uses less digits than its factorization.

11142840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92871 (or 92867 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 11142840 is about 3338.0892738212. The cubic root of 11142840 is about 223.3565184712.

Adding to 11142840 its reverse (4824111), we get a palindrome (15966951).

The spelling of 11142840 in words is "eleven million, one hundred forty-two thousand, eight hundred forty".