1289748 has 24 divisors (see below), whose sum is σ = 3140928. Its totient is φ = 411136.

The previous prime is 1289747. The next prime is 1289749. The reversal of 1289748 is 8479821.

It is an interprime number because it is at equal distance from previous prime (1289747) and next prime (1289749).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2061 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (130872).

2^1289748 is an apocalyptic number.

It is an amenable number.

1289748 is an abundant number, since it is smaller than the sum of its proper divisors (1851180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289748 is a wasteful number, since it uses less digits than its factorization.

1289748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703 (or 4701 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1289748 is about 1135.6707269275. The cubic root of 1289748 is about 108.8516344087.

The spelling of 1289748 in words is "one million, two hundred eighty-nine thousand, seven hundred forty-eight".