1289602 has 4 divisors (see below), whose sum is σ = 1934406. Its totient is φ = 644800.

The previous prime is 1289599. The next prime is 1289621. The reversal of 1289602 is 2069821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 516961 = 879^2 + 719^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322399 + ... + 322402.

2^1289602 is an apocalyptic number.

1289602 is a deficient number, since it is larger than the sum of its proper divisors (644804).

1289602 is an equidigital number, since it uses as much as digits as its factorization.

1289602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644803.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1289602 is about 1135.6064459134. The cubic root of 1289602 is about 108.8475269039.

It can be divided in two parts, 1289 and 602, that added together give a triangular number (1891 = T₆₁).

The spelling of 1289602 in words is "one million, two hundred eighty-nine thousand, six hundred two".