1445123340 has 36 divisors (see below), whose sum is σ = 4383541344. Its totient is φ = 385366176.

The previous prime is 1445123291. The next prime is 1445123347. The reversal of 1445123340 is 433215441.

It is a happy number.

1445123340 is a `hidden beast` number, since 144 + 512 + 3 + 3 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1445123347) 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 11 ways as a sum of consecutive naturals, for example, 4014052 + ... + 4014411.

Almost surely, 2^1445123340 is an apocalyptic number.

1445123340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445123340 is an abundant number, since it is smaller than the sum of its proper divisors (2938418004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445123340 is a wasteful number, since it uses less digits than its factorization.

1445123340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028478 (or 8028473 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1445123340 is about 38014.7779159632. Note that the first 3 decimals coincide. The cubic root of 1445123340 is about 1130.5808849363.

Adding to 1445123340 its reverse (433215441), we get a palindrome (1878338781).

The spelling of 1445123340 in words is "one billion, four hundred forty-five million, one hundred twenty-three thousand, three hundred forty".