4006557 has 16 divisors (see below), whose sum is σ = 5976000. Its totient is φ = 2652912.

The previous prime is 4006547. The next prime is 4006567. The reversal of 4006557 is 7556004.

4006557 is a `hidden beast` number, since 4 + 0 + 0 + 655 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (4006547) and next prime (4006567).

It is not a de Polignac number, because 4006557 - 2¹¹ = 4004509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 4006557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006517) 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, 4419 + ... + 5247.

It is an arithmetic number, because the mean of its divisors is an integer number (373500).

Almost surely, 2^4006557 is an apocalyptic number.

It is an amenable number.

4006557 is a deficient number, since it is larger than the sum of its proper divisors (1969443).

4006557 is a wasteful number, since it uses less digits than its factorization.

4006557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 4006557 is about 2001.6385787649. The cubic root of 4006557 is about 158.8267960839.

The spelling of 4006557 in words is "four million, six thousand, five hundred fifty-seven".