1142520 has 32 divisors (see below), whose sum is σ = 3427920. Its totient is φ = 304640.

The previous prime is 1142509. The next prime is 1142539. The reversal of 1142520 is 252411.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1142520.

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, 4641 + ... + 4880.

2^1142520 is an apocalyptic number.

1142520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142520 is an abundant number, since it is smaller than the sum of its proper divisors (2285400).

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

1142520 is a wasteful number, since it uses less digits than its factorization.

1142520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535 (or 9531 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1142520 is about 1068.8872718860. The cubic root of 1142520 is about 104.5413097973.

Adding to 1142520 its reverse (252411), we get a palindrome (1394931).

The spelling of 1142520 in words is "one million, one hundred forty-two thousand, five hundred twenty".