7445121 has 8 divisors (see below), whose sum is σ = 10005504. Its totient is φ = 4924080.

The previous prime is 7445047. The next prime is 7445159. The reversal of 7445121 is 1215447.

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

It is not a de Polignac number, because 7445121 - 2⁷ = 7444993 is a prime.

It is an Ulam number.

7445121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7445091 and 7445100.

It is not an unprimeable number, because it can be changed into a prime (7445161) 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, 9390 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (1250688).

Almost surely, 2^7445121 is an apocalyptic number.

It is an amenable number.

7445121 is a deficient number, since it is larger than the sum of its proper divisors (2560383).

7445121 is a wasteful number, since it uses less digits than its factorization.

7445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19671.

The product of its digits is 1120, while the sum is 24.

The square root of 7445121 is about 2728.5749027652. The cubic root of 7445121 is about 195.2647816566.

The spelling of 7445121 in words is "seven million, four hundred forty-five thousand, one hundred twenty-one".