1288461 has 4 divisors (see below), whose sum is σ = 1717952. Its totient is φ = 858972.

The previous prime is 1288439. The next prime is 1288487. The reversal of 1288461 is 1648821.

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: 1648821 = 3 ⋅549607.

It is not a de Polignac number, because 1288461 - 2⁵ = 1288429 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288421) 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, 214741 + ... + 214746.

It is an arithmetic number, because the mean of its divisors is an integer number (429488).

2^1288461 is an apocalyptic number.

It is an amenable number.

1288461 is a deficient number, since it is larger than the sum of its proper divisors (429491).

1288461 is an equidigital number, since it uses as much as digits as its factorization.

1288461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429490.

The product of its digits is 3072, while the sum is 30.

The square root of 1288461 is about 1135.1039599966. The cubic root of 1288461 is about 108.8154157889.

The spelling of 1288461 in words is "one million, two hundred eighty-eight thousand, four hundred sixty-one".