1215426 has 16 divisors (see below), whose sum is σ = 2447424. Its totient is φ = 402384.

The previous prime is 1215421. The next prime is 1215433. The reversal of 1215426 is 6245121.

It is a super-2 number, since 2×1215426² = 2954520722952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1215421) 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, 396 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (152964).

2^1215426 is an apocalyptic number.

1215426 is an abundant number, since it is smaller than the sum of its proper divisors (1231998).

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

1215426 is a wasteful number, since it uses less digits than its factorization.

1215426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385.

The product of its digits is 480, while the sum is 21.

The square root of 1215426 is about 1102.4636048414. The cubic root of 1215426 is about 106.7192687602.

The spelling of 1215426 in words is "one million, two hundred fifteen thousand, four hundred twenty-six".