1290940226 has 8 divisors (see below), whose sum is σ = 1936563660. Its totient is φ = 645419008.

The previous prime is 1290940213. The next prime is 1290940229. The reversal of 1290940226 is 6220490921.

It can be written as a sum of positive squares in 2 ways, for example, as 830880625 + 460059601 = 28825^2 + 21449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1290940229) 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, 31490 + ... + 59778.

Almost surely, 2^1290940226 is an apocalyptic number.

1290940226 is a deficient number, since it is larger than the sum of its proper divisors (645623434).

1290940226 is a wasteful number, since it uses less digits than its factorization.

1290940226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51108.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1290940226 is about 35929.6566362664. The cubic root of 1290940226 is about 1088.8516441647.

It can be divided in two parts, 12909 and 40226, that added together give a palindrome (53135).

The spelling of 1290940226 in words is "one billion, two hundred ninety million, nine hundred forty thousand, two hundred twenty-six".