1042052021 has 2 divisors, whose sum is σ = 1042052022. Its totient is φ = 1042052020.

The previous prime is 1042051973. The next prime is 1042052029. The reversal of 1042052021 is 1202502401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917484100 + 124567921 = 30290^2 + 11161^2 .

It is an emirp because it is prime and its reverse (1202502401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042052021 - 2²⁶ = 974943157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042052029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521026010 + 521026011.

It is an arithmetic number, because the mean of its divisors is an integer number (521026011).

Almost surely, 2^1042052021 is an apocalyptic number.

It is an amenable number.

1042052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042052021 is an equidigital number, since it uses as much as digits as its factorization.

1042052021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1042052021 is about 32280.8305500339. The cubic root of 1042052021 is about 1013.8253200053.

Adding to 1042052021 its reverse (1202502401), we get a palindrome (2244554422).

The spelling of 1042052021 in words is "one billion, forty-two million, fifty-two thousand, twenty-one".