1491031 has 2 divisors, whose sum is σ = 1491032. Its totient is φ = 1491030.

The previous prime is 1491013. The next prime is 1491041. The reversal of 1491031 is 1301941.

1491031 = 496² + 497² + ... + 501².

It is a happy number.

Together with previous prime (1491013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1301941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1491031 - 2⁵ = 1490999 is a prime.

It is a super-2 number, since 2×1491031² = 4446346885922, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₁₃₅₃₆ and since 1491031 and 113536 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745515 + 745516.

It is an arithmetic number, because the mean of its divisors is an integer number (745516).

2^1491031 is an apocalyptic number.

1491031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491031 is an equidigital number, since it uses as much as digits as its factorization.

1491031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1491031 is about 1221.0778025990. The cubic root of 1491031 is about 114.2428137343.

Adding to 1491031 its reverse (1301941), we get a palindrome (2792972).

It can be divided in two parts, 14910 and 31, that added together give a palindrome (14941).

The spelling of 1491031 in words is "one million, four hundred ninety-one thousand, thirty-one".