1225040 has 20 divisors (see below), whose sum is σ = 2848404. Its totient is φ = 489984.

The previous prime is 1225019. The next prime is 1225061. The reversal of 1225040 is 405221.

It is an interprime number because it is at equal distance from previous prime (1225019) and next prime (1225061).

It can be written as a sum of positive squares in 2 ways, for example, as 126736 + 1098304 = 356^2 + 1048^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7577 + ... + 7736.

2^1225040 is an apocalyptic number.

1225040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225040 is an abundant number, since it is smaller than the sum of its proper divisors (1623364).

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

1225040 is a wasteful number, since it uses less digits than its factorization.

1225040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15326 (or 15320 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1225040 is about 1106.8152510695. The cubic root of 1225040 is about 106.9999126561. Note that the first 4 decimals are identical.

It can be divided in two parts, 12250 and 40, that multiplied together give a square (490000 = 700²).

The spelling of 1225040 in words is "one million, two hundred twenty-five thousand, forty".