1289930 has 8 divisors (see below), whose sum is σ = 2321892. Its totient is φ = 515968.

The previous prime is 1289927. The next prime is 1289933. The reversal of 1289930 is 399821.

It is an interprime number because it is at equal distance from previous prime (1289927) and next prime (1289933).

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 6241 = 1133^2 + 79^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1289933) 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, 64487 + ... + 64506.

2^1289930 is an apocalyptic number.

1289930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289930 is a deficient number, since it is larger than the sum of its proper divisors (1031962).

1289930 is a wasteful number, since it uses less digits than its factorization.

1289930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129000.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1289930 is about 1135.7508529603. The cubic root of 1289930 is about 108.8567542888.

The spelling of 1289930 in words is "one million, two hundred eighty-nine thousand, nine hundred thirty".