7494021221 has 8 divisors (see below), whose sum is σ = 7611553344. Its totient is φ = 7376656320.

The previous prime is 7494021217. The next prime is 7494021259. The reversal of 7494021221 is 1221204947.

It is a happy number.

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 7494021221 - 2² = 7494021217 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 (7494021721) 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, 50096 + ... + 132278.

It is an arithmetic number, because the mean of its divisors is an integer number (951444168).

Almost surely, 2^7494021221 is an apocalyptic number.

It is an amenable number.

7494021221 is a deficient number, since it is larger than the sum of its proper divisors (117532123).

7494021221 is a wasteful number, since it uses less digits than its factorization.

7494021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83611.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7494021221 is about 86568.0149997677. The cubic root of 7494021221 is about 1956.9135461232.

The spelling of 7494021221 in words is "seven billion, four hundred ninety-four million, twenty-one thousand, two hundred twenty-one".