4207661 has 4 divisors (see below), whose sum is σ = 4343424. Its totient is φ = 4071900.

The previous prime is 4207657. The next prime is 4207663. The reversal of 4207661 is 1667024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4207661 - 2² = 4207657 is a prime.

It is a super-2 number, since 2×4207661² = 35408822181842, which contains 22 as substring.

It is an Ulam number.

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 4207661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4207663) 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, 67835 + ... + 67896.

It is an arithmetic number, because the mean of its divisors is an integer number (1085856).

Almost surely, 2^4207661 is an apocalyptic number.

It is an amenable number.

4207661 is a deficient number, since it is larger than the sum of its proper divisors (135763).

4207661 is a wasteful number, since it uses less digits than its factorization.

4207661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135762.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 4207661 is about 2051.2583942546. The cubic root of 4207661 is about 161.4409040397.

The spelling of 4207661 in words is "four million, two hundred seven thousand, six hundred sixty-one".