945263021 has 4 divisors (see below), whose sum is σ = 950544000. Its totient is φ = 939982044.

The previous prime is 945263009. The next prime is 945263027. The reversal of 945263021 is 120362549.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120362549 = 19 ⋅6334871.

It is a cyclic number.

It is not a de Polignac number, because 945263021 - 2¹⁰ = 945261997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945263027) 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, 2640221 + ... + 2640578.

It is an arithmetic number, because the mean of its divisors is an integer number (237636000).

Almost surely, 2^945263021 is an apocalyptic number.

It is an amenable number.

945263021 is a deficient number, since it is larger than the sum of its proper divisors (5280979).

945263021 is a wasteful number, since it uses less digits than its factorization.

945263021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280978.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 945263021 is about 30745.1300371295. The cubic root of 945263021 is about 981.4109279056.

The spelling of 945263021 in words is "nine hundred forty-five million, two hundred sixty-three thousand, twenty-one".