1321970145 has 8 divisors (see below), whose sum is σ = 2115152256. Its totient is φ = 705050736.

The previous prime is 1321970141. The next prime is 1321970161. The reversal of 1321970145 is 5410791231.

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

It is not a de Polignac number, because 1321970145 - 2² = 1321970141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321970141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44065657 + ... + 44065686.

It is an arithmetic number, because the mean of its divisors is an integer number (264394032).

Almost surely, 2^1321970145 is an apocalyptic number.

1321970145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321970145 is a deficient number, since it is larger than the sum of its proper divisors (793182111).

1321970145 is an equidigital number, since it uses as much as digits as its factorization.

1321970145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88131351.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1321970145 is about 36358.9073680714. The cubic root of 1321970145 is about 1097.5067899117.

The spelling of 1321970145 in words is "one billion, three hundred twenty-one million, nine hundred seventy thousand, one hundred forty-five".