1531379 has 2 divisors, whose sum is σ = 1531380. Its totient is φ = 1531378.

The previous prime is 1531373. The next prime is 1531447. The reversal of 1531379 is 9731351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1531379 - 2¹⁶ = 1465843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1531373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765689 + 765690.

It is an arithmetic number, because the mean of its divisors is an integer number (765690).

2^1531379 is an apocalyptic number.

1531379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531379 is an equidigital number, since it uses as much as digits as its factorization.

1531379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 29.

The square root of 1531379 is about 1237.4889898500. The cubic root of 1531379 is about 115.2641439250.

The spelling of 1531379 in words is "one million, five hundred thirty-one thousand, three hundred seventy-nine".