1445120531 has 4 divisors (see below), whose sum is σ = 1449828072. Its totient is φ = 1440412992.

The previous prime is 1445120527. The next prime is 1445120587. The reversal of 1445120531 is 1350215441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1350215441 = 18587 ⋅72643.

It is a cyclic number.

It is not a de Polignac number, because 1445120531 - 2² = 1445120527 is a prime.

It is a super-2 number, since 2×1445120531² = 4176746698235443922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445120531.

It is not an unprimeable number, because it can be changed into a prime (1445120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353310 + ... + 2353923.

It is an arithmetic number, because the mean of its divisors is an integer number (362457018).

Almost surely, 2^1445120531 is an apocalyptic number.

1445120531 is a deficient number, since it is larger than the sum of its proper divisors (4707541).

1445120531 is an equidigital number, since it uses as much as digits as its factorization.

1445120531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4707540.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1445120531 is about 38014.7409697870. The cubic root of 1445120531 is about 1130.5801524028.

Adding to 1445120531 its reverse (1350215441), we get a palindrome (2795335972).

The spelling of 1445120531 in words is "one billion, four hundred forty-five million, one hundred twenty thousand, five hundred thirty-one".