7478121 has 8 divisors (see below), whose sum is σ = 11395264. Its totient is φ = 4273200.

The previous prime is 7478117. The next prime is 7478129. The reversal of 7478121 is 1218747.

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

It is not a de Polignac number, because 7478121 - 2² = 7478117 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7478129) 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, 178030 + ... + 178071.

It is an arithmetic number, because the mean of its divisors is an integer number (1424408).

Almost surely, 2^7478121 is an apocalyptic number.

It is an amenable number.

7478121 is a deficient number, since it is larger than the sum of its proper divisors (3917143).

7478121 is a wasteful number, since it uses less digits than its factorization.

7478121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356111.

The product of its digits is 3136, while the sum is 30.

The square root of 7478121 is about 2734.6153294385. The cubic root of 7478121 is about 195.5528558057.

The spelling of 7478121 in words is "seven million, four hundred seventy-eight thousand, one hundred twenty-one".