1142581 has 8 divisors (see below), whose sum is σ = 1254528. Its totient is φ = 1032000.

The previous prime is 1142573. The next prime is 1142593. The reversal of 1142581 is 1852411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1142581 - 2³ = 1142573 is a prime.

It is a super-2 number, since 2×1142581² = 2610982683122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142881) 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, 2436 + ... + 2866.

It is an arithmetic number, because the mean of its divisors is an integer number (156816).

2^1142581 is an apocalyptic number.

1142581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1142581 is a deficient number, since it is larger than the sum of its proper divisors (111947).

1142581 is a wasteful number, since it uses less digits than its factorization.

1142581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683.

The product of its digits is 320, while the sum is 22.

The square root of 1142581 is about 1068.9158058519. The cubic root of 1142581 is about 104.5431702772.

Adding to 1142581 its reverse (1852411), we get a palindrome (2994992).

The spelling of 1142581 in words is "one million, one hundred forty-two thousand, five hundred eighty-one".