1215140445 has 48 divisors (see below), whose sum is σ = 2138572800. Its totient is φ = 638209152.

The previous prime is 1215140431. The next prime is 1215140453. The reversal of 1215140445 is 5440415121.

1215140445 is a `hidden beast` number, since 1 + 215 + 1 + 4 + 0 + 445 = 666.

It is not a de Polignac number, because 1215140445 - 2⁴ = 1215140429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 850822 + ... + 852248.

It is an arithmetic number, because the mean of its divisors is an integer number (44553600).

Almost surely, 2^1215140445 is an apocalyptic number.

1215140445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215140445 is a deficient number, since it is larger than the sum of its proper divisors (923432355).

1215140445 is a wasteful number, since it uses less digits than its factorization.

1215140445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1215140445 is about 34858.8646544893. The cubic root of 1215140445 is about 1067.1091048148.

Adding to 1215140445 its reverse (5440415121), we get a palindrome (6655555566).

The spelling of 1215140445 in words is "one billion, two hundred fifteen million, one hundred forty thousand, four hundred forty-five".