1212040 has 32 divisors (see below), whose sum is σ = 2758680. Its totient is φ = 479232.

The previous prime is 1212023. The next prime is 1212047. The reversal of 1212040 is 402121.

It can be written as a sum of positive squares in 4 ways, for example, as 702244 + 509796 = 838^2 + 714^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1212047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6184 + ... + 6376.

2^1212040 is an apocalyptic number.

1212040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212040 is an abundant number, since it is smaller than the sum of its proper divisors (1546640).

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

1212040 is a wasteful number, since it uses less digits than its factorization.

1212040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1212040 is about 1100.9268822224. The cubic root of 1212040 is about 106.6200751381.

Adding to 1212040 its reverse (402121), we get a palindrome (1614161).

The spelling of 1212040 in words is "one million, two hundred twelve thousand, forty".