1045142021 has 12 divisors (see below), whose sum is σ = 1326303360. Its totient is φ = 814395960.

The previous prime is 1045142003. The next prime is 1045142039. The reversal of 1045142021 is 1202415401.

It is a happy number.

1045142021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1045142003) and next prime (1045142039).

It is not a de Polignac number, because 1045142021 - 2⁶ = 1045141957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1045141984 and 1045142002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045142051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 968981 + ... + 970058.

It is an arithmetic number, because the mean of its divisors is an integer number (110525280).

Almost surely, 2^1045142021 is an apocalyptic number.

1045142021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1045142021 is a deficient number, since it is larger than the sum of its proper divisors (281161339).

1045142021 is a wasteful number, since it uses less digits than its factorization.

1045142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939064 (or 1939057 counting only the distinct ones).

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

The square root of 1045142021 is about 32328.6563438693. The cubic root of 1045142021 is about 1014.8264308835.

Adding to 1045142021 its reverse (1202415401), we get a palindrome (2247557422).

The spelling of 1045142021 in words is "one billion, forty-five million, one hundred forty-two thousand, twenty-one".