1531023 has 16 divisors (see below), whose sum is σ = 2259936. Its totient is φ = 915840.

The previous prime is 1531021. The next prime is 1531027. The reversal of 1531023 is 3201351.

It is a happy number.

It is not a de Polignac number, because 1531023 - 2¹ = 1531021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1530993 and 1531011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (141246).

2^1531023 is an apocalyptic number.

1531023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1531023 is a deficient number, since it is larger than the sum of its proper divisors (728913).

1531023 is a wasteful number, since it uses less digits than its factorization.

1531023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1531023 is about 1237.3451418258. The cubic root of 1531023 is about 115.2552114062.

Adding to 1531023 its reverse (3201351), we get a palindrome (4732374).

It can be divided in two parts, 153 and 1023, that added together give a triangular number (1176 = T₄₈).

The spelling of 1531023 in words is "one million, five hundred thirty-one thousand, twenty-three".