1142540 has 24 divisors (see below), whose sum is σ = 2742432. Its totient is φ = 391680.

The previous prime is 1142539. The next prime is 1142549. The reversal of 1142540 is 452411.

1142540 = 401² + 402² + ... + 407².

It is not an unprimeable number, because it can be changed into a prime (1142549) 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, 3941 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (114268).

2^1142540 is an apocalyptic number.

1142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142540 is an abundant number, since it is smaller than the sum of its proper divisors (1599892).

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

1142540 is a wasteful number, since it uses less digits than its factorization.

1142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177 (or 8175 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1142540 is about 1068.8966273686. The cubic root of 1142540 is about 104.5419197980.

Adding to 1142540 its reverse (452411), we get a palindrome (1594951).

The spelling of 1142540 in words is "one million, one hundred forty-two thousand, five hundred forty".