1531373 has 2 divisors, whose sum is σ = 1531374. Its totient is φ = 1531372.

The previous prime is 1531367. The next prime is 1531379. The reversal of 1531373 is 3731351.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1531367) and next prime (1531379).

It can be written as a sum of positive squares in only one way, i.e., 1214404 + 316969 = 1102^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531373 - 2⁴ = 1531357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765686 + 765687.

It is an arithmetic number, because the mean of its divisors is an integer number (765687).

2^1531373 is an apocalyptic number.

It is an amenable number.

1531373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531373 is an equidigital number, since it uses as much as digits as its factorization.

1531373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945, while the sum is 23.

The square root of 1531373 is about 1237.4865655836. The cubic root of 1531373 is about 115.2639933884.

The spelling of 1531373 in words is "one million, five hundred thirty-one thousand, three hundred seventy-three".