1478261 has 4 divisors (see below), whose sum is σ = 1518252. Its totient is φ = 1438272.

The previous prime is 1478251. The next prime is 1478263. The reversal of 1478261 is 1628741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1628741 = 613 ⋅2657.

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 255025 = 1106^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1478261 - 2¹⁴ = 1461877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19940 + ... + 20013.

It is an arithmetic number, because the mean of its divisors is an integer number (379563).

2^1478261 is an apocalyptic number.

It is an amenable number.

1478261 is a deficient number, since it is larger than the sum of its proper divisors (39991).

1478261 is an equidigital number, since it uses as much as digits as its factorization.

1478261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39990.

The product of its digits is 2688, while the sum is 29.

The square root of 1478261 is about 1215.8375713885. The cubic root of 1478261 is about 113.9157323290.

The spelling of 1478261 in words is "one million, four hundred seventy-eight thousand, two hundred sixty-one".