4077561 has 16 divisors (see below), whose sum is σ = 5652416. Its totient is φ = 2612736.

The previous prime is 4077559. The next prime is 4077583. The reversal of 4077561 is 1657704.

It is a happy number.

It is not a de Polignac number, because 4077561 - 2¹ = 4077559 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4077551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9201 + ... + 9633.

It is an arithmetic number, because the mean of its divisors is an integer number (353276).

Almost surely, 2^4077561 is an apocalyptic number.

It is an amenable number.

4077561 is a deficient number, since it is larger than the sum of its proper divisors (1574855).

4077561 is a wasteful number, since it uses less digits than its factorization.

4077561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 4077561 is about 2019.2971549527. The cubic root of 4077561 is about 159.7595476769.

The spelling of 4077561 in words is "four million, seventy-seven thousand, five hundred sixty-one".