1131642 has 12 divisors (see below), whose sum is σ = 2451930. Its totient is φ = 377208.

The previous prime is 1131629. The next prime is 1131643. The reversal of 1131642 is 2461311.

1131642 = 44² + 45² + ... + 151².

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 47961 = 1041^2 + 219^2 .

It is a super-2 number, since 2×1131642² = 2561227232328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 62869 = 1131642 / (1 + 1 + 3 + 1 + 6 + 4 + 2).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1131643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31417 + ... + 31452.

2^1131642 is an apocalyptic number.

1131642 is an abundant number, since it is smaller than the sum of its proper divisors (1320288).

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

1131642 is a wasteful number, since it uses less digits than its factorization.

1131642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62877 (or 62874 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1131642 is about 1063.7866327417. The cubic root of 1131642 is about 104.2084699061.

Adding to 1131642 its reverse (2461311), we get a palindrome (3592953).

The spelling of 1131642 in words is "one million, one hundred thirty-one thousand, six hundred forty-two".