1531147 has 2 divisors, whose sum is σ = 1531148. Its totient is φ = 1531146.

The previous prime is 1531129. The next prime is 1531157. The reversal of 1531147 is 7411351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1531147 - 2¹⁵ = 1498379 is a prime.

It is a super-2 number, since 2×1531147² = 4688822271218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1531157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765573 + 765574.

It is an arithmetic number, because the mean of its divisors is an integer number (765574).

2^1531147 is an apocalyptic number.

1531147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531147 is an equidigital number, since it uses as much as digits as its factorization.

1531147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 22.

The square root of 1531147 is about 1237.3952480917. The cubic root of 1531147 is about 115.2583228901.

Adding to 1531147 its reverse (7411351), we get a palindrome (8942498).

The spelling of 1531147 in words is "one million, five hundred thirty-one thousand, one hundred forty-seven".