4151561 has 4 divisors (see below), whose sum is σ = 4165392. Its totient is φ = 4137732.

The previous prime is 4151549. The next prime is 4151629. The reversal of 4151561 is 1651514.

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 a de Polignac number, because none of the positive numbers 2^k-4151561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4151501) 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, 6455 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (1041348).

Almost surely, 2^4151561 is an apocalyptic number.

It is an amenable number.

4151561 is a deficient number, since it is larger than the sum of its proper divisors (13831).

4151561 is a wasteful number, since it uses less digits than its factorization.

4151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830.

The product of its digits is 600, while the sum is 23.

The square root of 4151561 is about 2037.5379751062. The cubic root of 4151561 is about 160.7202038220.

The spelling of 4151561 in words is "four million, one hundred fifty-one thousand, five hundred sixty-one".