2942090021 has 8 divisors (see below), whose sum is σ = 3185912184. Its totient is φ = 2700768960.

The previous prime is 2942089939. The next prime is 2942090029. The reversal of 2942090021 is 1200902492.

It can be written as a sum of positive squares in 4 ways, for example, as 220900 + 2941869121 = 470^2 + 54239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2942090021 - 2¹⁴ = 2942073637 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2942090029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622826 + ... + 627531.

It is an arithmetic number, because the mean of its divisors is an integer number (398239023).

Almost surely, 2^2942090021 is an apocalyptic number.

It is an amenable number.

2942090021 is a deficient number, since it is larger than the sum of its proper divisors (243822163).

2942090021 is a wasteful number, since it uses less digits than its factorization.

2942090021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250551.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2942090021 is about 54241.0363193772. The cubic root of 2942090021 is about 1432.9091381398.

The spelling of 2942090021 in words is "two billion, nine hundred forty-two million, ninety thousand, twenty-one".