1561465 has 8 divisors (see below), whose sum is σ = 1889280. Its totient is φ = 1238832.

The previous prime is 1561463. The next prime is 1561499. The reversal of 1561465 is 5641651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1561465 - 2¹ = 1561463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (236160).

2^1561465 is an apocalyptic number.

It is an amenable number.

1561465 is a deficient number, since it is larger than the sum of its proper divisors (327815).

1561465 is a wasteful number, since it uses less digits than its factorization.

1561465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591.

The product of its digits is 3600, while the sum is 28.

The square root of 1561465 is about 1249.5859314189. The cubic root of 1561465 is about 116.0140936106.

The spelling of 1561465 in words is "one million, five hundred sixty-one thousand, four hundred sixty-five".