7001641 has 4 divisors (see below), whose sum is σ = 7116484. Its totient is φ = 6886800.

The previous prime is 7001639. The next prime is 7001653. The reversal of 7001641 is 1461007.

7001641 = T₂₁₅₉ + T₂₁₆₀ + T₂₁₆₁.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1461007 = 239 ⋅6113.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 6911641 = 300^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 7001641 - 2¹ = 7001639 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7001681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57330 + ... + 57451.

It is an arithmetic number, because the mean of its divisors is an integer number (1779121).

Almost surely, 2^7001641 is an apocalyptic number.

7001641 is the 2161-st centered triangular number.

It is an amenable number.

7001641 is a deficient number, since it is larger than the sum of its proper divisors (114843).

7001641 is a wasteful number, since it uses less digits than its factorization.

7001641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114842.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 7001641 is about 2646.0614127416. The cubic root of 7001641 is about 191.3080653001.

Adding to 7001641 its reverse (1461007), we get a palindrome (8462648).

The spelling of 7001641 in words is "seven million, one thousand, six hundred forty-one".