7521057 has 6 divisors (see below), whose sum is σ = 10863762. Its totient is φ = 5014032.

The previous prime is 7521053. The next prime is 7521061. The reversal of 7521057 is 7501257.

7521057 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7521053) and next prime (7521061).

It can be written as a sum of positive squares in only one way, i.e., 5377761 + 2143296 = 2319^2 + 1464^2 .

It is not a de Polignac number, because 7521057 - 2² = 7521053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7521057.

It is not an unprimeable number, because it can be changed into a prime (7521053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 417828 + ... + 417845.

It is an arithmetic number, because the mean of its divisors is an integer number (1810627).

Almost surely, 2^7521057 is an apocalyptic number.

It is an amenable number.

7521057 is a deficient number, since it is larger than the sum of its proper divisors (3342705).

7521057 is a wasteful number, since it uses less digits than its factorization.

7521057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835679 (or 835676 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 7521057 is about 2742.4545575087. The cubic root of 7521057 is about 195.9264005907.

The spelling of 7521057 in words is "seven million, five hundred twenty-one thousand, fifty-seven".