1631141 has 4 divisors (see below), whose sum is σ = 1641312. Its totient is φ = 1620972.

The previous prime is 1631117. The next prime is 1631143. The reversal of 1631141 is 1411361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1411361 = 7 ⋅201623.

It is a cyclic number.

It is not a de Polignac number, because 1631141 - 2¹⁰ = 1630117 is a prime.

It is an Ulam number.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 4841 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (410328).

2^1631141 is an apocalyptic number.

It is an amenable number.

1631141 is a deficient number, since it is larger than the sum of its proper divisors (10171).

1631141 is a wasteful number, since it uses less digits than its factorization.

1631141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170.

The product of its digits is 72, while the sum is 17.

The square root of 1631141 is about 1277.1613053957. The cubic root of 1631141 is about 117.7146461299.

The spelling of 1631141 in words is "one million, six hundred thirty-one thousand, one hundred forty-one".