1289230 has 8 divisors (see below), whose sum is σ = 2320632. Its totient is φ = 515688.

The previous prime is 1289213. The next prime is 1289231. The reversal of 1289230 is 329821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1289230² = 3324227985800, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1289195 and 1289204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289231) 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, 64452 + ... + 64471.

It is an arithmetic number, because the mean of its divisors is an integer number (290079).

2^1289230 is an apocalyptic number.

1289230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289230 is a deficient number, since it is larger than the sum of its proper divisors (1031402).

1289230 is a wasteful number, since it uses less digits than its factorization.

1289230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128930.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1289230 is about 1135.4426449627. The cubic root of 1289230 is about 108.8370598052.

It can be divided in two parts, 12892 and 30, that multiplied together give a triangular number (386760 = T₈₇₉).

The spelling of 1289230 in words is "one million, two hundred eighty-nine thousand, two hundred thirty".