1631142 has 12 divisors (see below), whose sum is σ = 3534180. Its totient is φ = 543708.

The previous prime is 1631117. The next prime is 1631143. The reversal of 1631142 is 2411361.

It is a happy number.

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: 90619 = 1631142 / (1 + 6 + 3 + 1 + 1 + 4 + 2).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631143) 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 5 ways as a sum of consecutive naturals, for example, 45292 + ... + 45327.

It is an arithmetic number, because the mean of its divisors is an integer number (294515).

2^1631142 is an apocalyptic number.

1631142 is an abundant number, since it is smaller than the sum of its proper divisors (1903038).

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

1631142 is a wasteful number, since it uses less digits than its factorization.

1631142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90627 (or 90624 counting only the distinct ones).

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

The square root of 1631142 is about 1277.1616968888. The cubic root of 1631142 is about 117.7146701856.

The spelling of 1631142 in words is "one million, six hundred thirty-one thousand, one hundred forty-two".