7721494 has 12 divisors (see below), whose sum is σ = 12731292. Its totient is φ = 3509660.

The previous prime is 7721479. The next prime is 7721501. The reversal of 7721494 is 4941277.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15712 + ... + 16195.

It is an arithmetic number, because the mean of its divisors is an integer number (1060941).

Almost surely, 2^7721494 is an apocalyptic number.

7721494 is a deficient number, since it is larger than the sum of its proper divisors (5009798).

7721494 is a wasteful number, since it uses less digits than its factorization.

7721494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31931 (or 31920 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 7721494 is about 2778.7576360669. The cubic root of 7721494 is about 197.6516508697.

The spelling of 7721494 in words is "seven million, seven hundred twenty-one thousand, four hundred ninety-four".