1531081 has 2 divisors, whose sum is σ = 1531082. Its totient is φ = 1531080.

The previous prime is 1531051. The next prime is 1531091. The reversal of 1531081 is 1801351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1121481 + 409600 = 1059^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531081 - 2⁷ = 1530953 is a prime.

It is a super-2 number, since 2×1531081² = 4688418057122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1531021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765540 + 765541.

It is an arithmetic number, because the mean of its divisors is an integer number (765541).

2^1531081 is an apocalyptic number.

It is an amenable number.

1531081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531081 is an equidigital number, since it uses as much as digits as its factorization.

1531081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1531081 is about 1237.3685788802. The cubic root of 1531081 is about 115.2566667986.

The spelling of 1531081 in words is "one million, five hundred thirty-one thousand, eighty-one".