1040421157 has 2 divisors, whose sum is σ = 1040421158. Its totient is φ = 1040421156.

The previous prime is 1040421113. The next prime is 1040421181. The reversal of 1040421157 is 7511240401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936910881 + 103510276 = 30609^2 + 10174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040421157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040421757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520210578 + 520210579.

It is an arithmetic number, because the mean of its divisors is an integer number (520210579).

Almost surely, 2^1040421157 is an apocalyptic number.

It is an amenable number.

1040421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040421157 is an equidigital number, since it uses as much as digits as its factorization.

1040421157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1040421157 is about 32255.5600943465. The cubic root of 1040421157 is about 1013.2961479194.

Adding to 1040421157 its reverse (7511240401), we get a palindrome (8551661558).

The spelling of 1040421157 in words is "one billion, forty million, four hundred twenty-one thousand, one hundred fifty-seven".