1015042421 has 2 divisors, whose sum is σ = 1015042422. Its totient is φ = 1015042420.

The previous prime is 1015042403. The next prime is 1015042447. The reversal of 1015042421 is 1242405101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 955675396 + 59367025 = 30914^2 + 7705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1015042421 - 2¹⁰ = 1015041397 is a prime.

It is a super-2 number, since 2×1015042421² = 2060622232859082482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1015042393 and 1015042402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015042471) 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, 507521210 + 507521211.

It is an arithmetic number, because the mean of its divisors is an integer number (507521211).

Almost surely, 2^1015042421 is an apocalyptic number.

It is an amenable number.

1015042421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015042421 is an equidigital number, since it uses as much as digits as its factorization.

1015042421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1015042421 is about 31859.7303974783. The cubic root of 1015042421 is about 1004.9892067519.

Adding to 1015042421 its reverse (1242405101), we get a palindrome (2257447522).

The spelling of 1015042421 in words is "one billion, fifteen million, forty-two thousand, four hundred twenty-one".