1019531 has 2 divisors, whose sum is σ = 1019532. Its totient is φ = 1019530.

The previous prime is 1019509. The next prime is 1019533. The reversal of 1019531 is 1359101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1019531 - 2⁶ = 1019467 is a prime.

It is a super-2 number, since 2×1019531² = 2078886919922, which contains 22 as substring.

Together with 1019533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1019533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509765 + 509766.

It is an arithmetic number, because the mean of its divisors is an integer number (509766).

2^1019531 is an apocalyptic number.

1019531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019531 is an equidigital number, since it uses as much as digits as its factorization.

1019531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1019531 is about 1009.7182775408. The cubic root of 1019531 is about 100.6468402884.

The spelling of 1019531 in words is "one million, nineteen thousand, five hundred thirty-one".