1142388 has 36 divisors (see below), whose sum is σ = 3111108. Its totient is φ = 351360.

The previous prime is 1142363. The next prime is 1142389. The reversal of 1142388 is 8832411.

It can be written as a sum of positive squares in 2 ways, for example, as 138384 + 1004004 = 372^2 + 1002^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753 + ... + 1688.

2^1142388 is an apocalyptic number.

1142388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1142388 is an abundant number, since it is smaller than the sum of its proper divisors (1968720).

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

1142388 is a wasteful number, since it uses less digits than its factorization.

1142388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464 (or 2459 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1142388 is about 1068.8255236473. The cubic root of 1142388 is about 104.5372836141.

Adding to 1142388 its reverse (8832411), we get a palindrome (9974799).

It can be divided in two parts, 11423 and 88, that added together give a palindrome (11511).

The spelling of 1142388 in words is "one million, one hundred forty-two thousand, three hundred eighty-eight".