7521945 has 8 divisors (see below), whose sum is σ = 12035136. Its totient is φ = 4011696.

The previous prime is 7521937. The next prime is 7521949. The reversal of 7521945 is 5491257.

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

It is not a de Polignac number, because 7521945 - 2³ = 7521937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7521949) 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, 250717 + ... + 250746.

It is an arithmetic number, because the mean of its divisors is an integer number (1504392).

Almost surely, 2^7521945 is an apocalyptic number.

It is an amenable number.

7521945 is a deficient number, since it is larger than the sum of its proper divisors (4513191).

7521945 is a wasteful number, since it uses less digits than its factorization.

7521945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501471.

The product of its digits is 12600, while the sum is 33.

The square root of 7521945 is about 2742.6164514930. The cubic root of 7521945 is about 195.9341112000.

The spelling of 7521945 in words is "seven million, five hundred twenty-one thousand, nine hundred forty-five".