1013531 has 2 divisors, whose sum is σ = 1013532. Its totient is φ = 1013530.

The previous prime is 1013527. The next prime is 1013533. The reversal of 1013531 is 1353101.

It is a strong prime.

It is an emirp because it is prime and its reverse (1353101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1013531 - 2² = 1013527 is a prime.

It is a super-2 number, since 2×1013531² = 2054490175922, which contains 22 as substring.

Together with 1013533, 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 (1013533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506765 + 506766.

It is an arithmetic number, because the mean of its divisors is an integer number (506766).

2^1013531 is an apocalyptic number.

1013531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013531 is an equidigital number, since it uses as much as digits as its factorization.

1013531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 1013531 is about 1006.7427675429. The cubic root of 1013531 is about 100.4490141784.

Adding to 1013531 its reverse (1353101), we get a palindrome (2366632).

The spelling of 1013531 in words is "one million, thirteen thousand, five hundred thirty-one".