1042015021 has 4 divisors (see below), whose sum is σ = 1057567552. Its totient is φ = 1026462492.

The previous prime is 1042015019. The next prime is 1042015049. The reversal of 1042015021 is 1205102401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1042015021 - 2¹ = 1042015019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042014986 and 1042015004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042015321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7776165 + ... + 7776298.

It is an arithmetic number, because the mean of its divisors is an integer number (264391888).

Almost surely, 2^1042015021 is an apocalyptic number.

It is an amenable number.

1042015021 is a deficient number, since it is larger than the sum of its proper divisors (15552531).

1042015021 is an equidigital number, since it uses as much as digits as its factorization.

1042015021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552530.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1042015021 is about 32280.2574494071. The cubic root of 1042015021 is about 1013.8133206105.

Adding to 1042015021 its reverse (1205102401), we get a palindrome (2247117422).

The spelling of 1042015021 in words is "one billion, forty-two million, fifteen thousand, twenty-one".