1010042591 has 2 divisors, whose sum is σ = 1010042592. Its totient is φ = 1010042590.

The previous prime is 1010042581. The next prime is 1010042599. The reversal of 1010042591 is 1952400101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1010042591 - 2¹⁴ = 1010026207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010042599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505021295 + 505021296.

It is an arithmetic number, because the mean of its divisors is an integer number (505021296).

Almost surely, 2^1010042591 is an apocalyptic number.

1010042591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010042591 is an equidigital number, since it uses as much as digits as its factorization.

1010042591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1010042591 is about 31781.1672378470. The cubic root of 1010042591 is about 1003.3363864790.

Adding to 1010042591 its reverse (1952400101), we get a palindrome (2962442692).

The spelling of 1010042591 in words is "one billion, ten million, forty-two thousand, five hundred ninety-one".