1293890 has 32 divisors (see below), whose sum is σ = 2585520. Its totient is φ = 463104.

The previous prime is 1293869. The next prime is 1293899. The reversal of 1293890 is 983921.

It can be written as a sum of positive squares in 8 ways, for example, as 279841 + 1014049 = 529^2 + 1007^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4676 + ... + 4944.

2^1293890 is an apocalyptic number.

1293890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1293890 is a deficient number, since it is larger than the sum of its proper divisors (1291630).

1293890 is a wasteful number, since it uses less digits than its factorization.

1293890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326.

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

The square root of 1293890 is about 1137.4928571204. The cubic root of 1293890 is about 108.9680348431.

The spelling of 1293890 in words is "one million, two hundred ninety-three thousand, eight hundred ninety".