1445212340 has 48 divisors (see below), whose sum is σ = 3565537920. Its totient is φ = 485105280.

The previous prime is 1445212339. The next prime is 1445212369. The reversal of 1445212340 is 432125441.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 249800 + ... + 255519.

It is an arithmetic number, because the mean of its divisors is an integer number (74282040).

Almost surely, 2^1445212340 is an apocalyptic number.

1445212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445212340 is an abundant number, since it is smaller than the sum of its proper divisors (2120325580).

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

1445212340 is a wasteful number, since it uses less digits than its factorization.

1445212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505352 (or 505350 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1445212340 is about 38015.9484953355. The cubic root of 1445212340 is about 1130.6040939433.

Adding to 1445212340 its reverse (432125441), we get a palindrome (1877337781).

The spelling of 1445212340 in words is "one billion, four hundred forty-five million, two hundred twelve thousand, three hundred forty".