1290328031 has 2 divisors, whose sum is σ = 1290328032. Its totient is φ = 1290328030.

The previous prime is 1290328027. The next prime is 1290328147. The reversal of 1290328031 is 1308230921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1290328031 - 2² = 1290328027 is a prime.

It is a super-2 number, since 2×1290328031² = 3329892855168673922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1290327985 and 1290328003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290328021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645164015 + 645164016.

It is an arithmetic number, because the mean of its divisors is an integer number (645164016).

Almost surely, 2^1290328031 is an apocalyptic number.

1290328031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290328031 is an equidigital number, since it uses as much as digits as its factorization.

1290328031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1290328031 is about 35921.1362710035. The cubic root of 1290328031 is about 1088.6794970434.

Adding to 1290328031 its reverse (1308230921), we get a palindrome (2598558952).

The spelling of 1290328031 in words is "one billion, two hundred ninety million, three hundred twenty-eight thousand, thirty-one".