1631123 has 4 divisors (see below), whose sum is σ = 1756608. Its totient is φ = 1505640.

The previous prime is 1631117. The next prime is 1631143. The reversal of 1631123 is 3211361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3211361 = 19 ⋅169019.

It is a cyclic number.

It is not a de Polignac number, because 1631123 - 2⁶ = 1631059 is a prime.

It is a super-2 number, since 2×1631123² = 5321124482258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

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, 62723 + ... + 62748.

It is an arithmetic number, because the mean of its divisors is an integer number (439152).

2^1631123 is an apocalyptic number.

1631123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1631123 is a deficient number, since it is larger than the sum of its proper divisors (125485).

1631123 is a wasteful number, since it uses less digits than its factorization.

1631123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125484.

The product of its digits is 108, while the sum is 17.

The square root of 1631123 is about 1277.1542584982. The cubic root of 1631123 is about 117.7142131259.

Adding to 1631123 its reverse (3211361), we get a palindrome (4842484).

The spelling of 1631123 in words is "one million, six hundred thirty-one thousand, one hundred twenty-three".