1290040 has 16 divisors (see below), whose sum is σ = 2902680. Its totient is φ = 516000.

The previous prime is 1290031. The next prime is 1290049. The reversal of 1290040 is 400921.

It is an interprime number because it is at equal distance from previous prime (1290031) and next prime (1290049).

It is a junction number, because it is equal to n+sod(n) for n = 1289996 and 1290023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290049) 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, 16086 + ... + 16165.

2^1290040 is an apocalyptic number.

1290040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290040 is an abundant number, since it is smaller than the sum of its proper divisors (1612640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290040 is a wasteful number, since it uses less digits than its factorization.

1290040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32262 (or 32258 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1290040 is about 1135.7992780417. The cubic root of 1290040 is about 108.8598484884.

Adding to 1290040 its reverse (400921), we get a palindrome (1690961).

The spelling of 1290040 in words is "one million, two hundred ninety thousand, forty".