945012021 has 16 divisors (see below), whose sum is σ = 1279647936. Its totient is φ = 620245376.

The previous prime is 945012011. The next prime is 945012023. The reversal of 945012021 is 120210549.

It is a cyclic number.

It is not a de Polignac number, because 945012021 - 2¹⁸ = 944749877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 945011982 and 945012000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945012023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66481 + ... + 79433.

It is an arithmetic number, because the mean of its divisors is an integer number (79977996).

Almost surely, 2^945012021 is an apocalyptic number.

It is an amenable number.

945012021 is a deficient number, since it is larger than the sum of its proper divisors (334635915).

945012021 is a wasteful number, since it uses less digits than its factorization.

945012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13332.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 945012021 is about 30741.0478188366. The cubic root of 945012021 is about 981.3240540430.

The spelling of 945012021 in words is "nine hundred forty-five million, twelve thousand, twenty-one".