1561417 has 16 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 1281600.

The previous prime is 1561393. The next prime is 1561421. The reversal of 1561417 is 7141651.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1561417 - 2¹⁹ = 1037129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1561391 and 1561400.

It is not an unprimeable number, because it can be changed into a prime (1561457) 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, 8634 + ... + 8812.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^1561417 is an apocalyptic number.

It is an amenable number.

1561417 is a deficient number, since it is larger than the sum of its proper divisors (313463).

1561417 is a wasteful number, since it uses less digits than its factorization.

1561417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264.

The product of its digits is 840, while the sum is 25.

The square root of 1561417 is about 1249.5667249091. The cubic root of 1561417 is about 116.0129048267.

The spelling of 1561417 in words is "one million, five hundred sixty-one thousand, four hundred seventeen".