1461689 has 6 divisors (see below), whose sum is σ = 1543050. Its totient is φ = 1384416.

The previous prime is 1461683. The next prime is 1461697. The reversal of 1461689 is 9861641.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 369664 = 1045^2 + 608^2 .

It is not a de Polignac number, because 1461689 - 2²⁰ = 413113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1461683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1664 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (257175).

2^1461689 is an apocalyptic number.

1461689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1461689 is a deficient number, since it is larger than the sum of its proper divisors (81361).

1461689 is an equidigital number, since it uses as much as digits as its factorization.

1461689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087 (or 4068 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 1461689 is about 1209.0033085149. The cubic root of 1461689 is about 113.4884486941.

The spelling of 1461689 in words is "one million, four hundred sixty-one thousand, six hundred eighty-nine".