7057621 has 4 divisors (see below), whose sum is σ = 7102732. Its totient is φ = 7012512.

The previous prime is 7057591. The next prime is 7057637. The reversal of 7057621 is 1267507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1267507 = 23 ⋅55109.

It can be written as a sum of positive squares in 2 ways, for example, as 5354596 + 1703025 = 2314^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 7057621 - 2¹³ = 7049429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7057621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7057651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22320 + ... + 22633.

It is an arithmetic number, because the mean of its divisors is an integer number (1775683).

Almost surely, 2^7057621 is an apocalyptic number.

It is an amenable number.

7057621 is a deficient number, since it is larger than the sum of its proper divisors (45111).

7057621 is a wasteful number, since it uses less digits than its factorization.

7057621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45110.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 7057621 is about 2656.6183391673. The cubic root of 7057621 is about 191.8165656180.

The spelling of 7057621 in words is "seven million, fifty-seven thousand, six hundred twenty-one".