1321985470 has 32 divisors (see below), whose sum is σ = 2597740992. Its totient is φ = 481427712.

The previous prime is 1321985461. The next prime is 1321985557. The reversal of 1321985470 is 745891231.

It is a super-2 number, since 2×1321985470² = 3495291165782241800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60162 + ... + 79141.

It is an arithmetic number, because the mean of its divisors is an integer number (81179406).

Almost surely, 2^1321985470 is an apocalyptic number.

1321985470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321985470 is a deficient number, since it is larger than the sum of its proper divisors (1275755522).

1321985470 is a wasteful number, since it uses less digits than its factorization.

1321985470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139396.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1321985470 is about 36359.1181136177. The cubic root of 1321985470 is about 1097.5110308614.

It can be divided in two parts, 13219 and 85470, that added together give a palindrome (98689).

The spelling of 1321985470 in words is "one billion, three hundred twenty-one million, nine hundred eighty-five thousand, four hundred seventy".