1461691 has 16 divisors (see below), whose sum is σ = 1870848. Its totient is φ = 1108800.

The previous prime is 1461683. The next prime is 1461697. The reversal of 1461691 is 1961641.

It is not a de Polignac number, because 1461691 - 2³ = 1461683 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1461697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2926 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (116928).

2^1461691 is an apocalyptic number.

1461691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1461691 is a deficient number, since it is larger than the sum of its proper divisors (409157).

1461691 is a wasteful number, since it uses less digits than its factorization.

1461691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its digits is 1296, while the sum is 28.

The square root of 1461691 is about 1209.0041356422. The cubic root of 1461691 is about 113.4885004554.

The spelling of 1461691 in words is "one million, four hundred sixty-one thousand, six hundred ninety-one".