1465721 has 4 divisors (see below), whose sum is σ = 1529472. Its totient is φ = 1401972.

The previous prime is 1465703. The next prime is 1465727. The reversal of 1465721 is 1275641.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1275641 = 19 ⋅67139.

It is a cyclic number.

It is not a de Polignac number, because 1465721 - 2¹⁴ = 1449337 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 (1465727) 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 3 ways as a sum of consecutive naturals, for example, 31841 + ... + 31886.

It is an arithmetic number, because the mean of its divisors is an integer number (382368).

2^1465721 is an apocalyptic number.

It is an amenable number.

1465721 is a deficient number, since it is larger than the sum of its proper divisors (63751).

1465721 is an equidigital number, since it uses as much as digits as its factorization.

1465721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63750.

The product of its digits is 1680, while the sum is 26.

The square root of 1465721 is about 1210.6696494090. The cubic root of 1465721 is about 113.5927037319.

The spelling of 1465721 in words is "one million, four hundred sixty-five thousand, seven hundred twenty-one".