1010421491 has 2 divisors, whose sum is σ = 1010421492. Its totient is φ = 1010421490.

The previous prime is 1010421481. The next prime is 1010421497. The reversal of 1010421491 is 1941240101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1010421491 - 2⁶ = 1010421427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1010421497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505210745 + 505210746.

It is an arithmetic number, because the mean of its divisors is an integer number (505210746).

Almost surely, 2^1010421491 is an apocalyptic number.

1010421491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010421491 is an equidigital number, since it uses as much as digits as its factorization.

1010421491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1010421491 is about 31787.1277563733. The cubic root of 1010421491 is about 1003.4618322218.

Adding to 1010421491 its reverse (1941240101), we get a palindrome (2951661592).

The spelling of 1010421491 in words is "one billion, ten million, four hundred twenty-one thousand, four hundred ninety-one".