1321260490 has 16 divisors (see below), whose sum is σ = 2594475360. Its totient is φ = 480458320.

The previous prime is 1321260463. The next prime is 1321260497. The reversal of 1321260490 is 940621231.

It is not an unprimeable number, because it can be changed into a prime (1321260497) 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, 6005620 + ... + 6005839.

It is an arithmetic number, because the mean of its divisors is an integer number (162154710).

Almost surely, 2^1321260490 is an apocalyptic number.

1321260490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321260490 is a deficient number, since it is larger than the sum of its proper divisors (1273214870).

1321260490 is a wasteful number, since it uses less digits than its factorization.

1321260490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011477.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1321260490 is about 36349.1470326334. The cubic root of 1321260490 is about 1097.3103682824.

The spelling of 1321260490 in words is "one billion, three hundred twenty-one million, two hundred sixty thousand, four hundred ninety".