7650021 has 8 divisors (see below), whose sum is σ = 10219264. Its totient is φ = 5090400.

The previous prime is 7650011. The next prime is 7650023. The reversal of 7650021 is 1200567.

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

It is not a de Polignac number, because 7650021 - 2⁷ = 7649893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7650021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7650023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 3921.

It is an arithmetic number, because the mean of its divisors is an integer number (1277408).

Almost surely, 2^7650021 is an apocalyptic number.

It is an amenable number.

7650021 is a deficient number, since it is larger than the sum of its proper divisors (2569243).

7650021 is a wasteful number, since it uses less digits than its factorization.

7650021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 7650021 is about 2765.8671334683. The cubic root of 7650021 is about 197.0399139238.

Adding to 7650021 its reverse (1200567), we get a palindrome (8850588).

The spelling of 7650021 in words is "seven million, six hundred fifty thousand, twenty-one".