1289290 has 16 divisors (see below), whose sum is σ = 2396160. Its totient is φ = 498960.

The previous prime is 1289287. The next prime is 1289303. The reversal of 1289290 is 929821.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (149760).

2^1289290 is an apocalyptic number.

1289290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289290 is a deficient number, since it is larger than the sum of its proper divisors (1106870).

1289290 is a wasteful number, since it uses less digits than its factorization.

1289290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1289290 is about 1135.4690660692. The cubic root of 1289290 is about 108.8387481831.

The spelling of 1289290 in words is "one million, two hundred eighty-nine thousand, two hundred ninety".