1215070140 has 48 divisors (see below), whose sum is σ = 3581262720. Its totient is φ = 306964800.

The previous prime is 1215070127. The next prime is 1215070169. The reversal of 1215070140 is 410705121.

It is a happy number.

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, 531786 + ... + 534065.

It is an arithmetic number, because the mean of its divisors is an integer number (74609640).

Almost surely, 2^1215070140 is an apocalyptic number.

1215070140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215070140 is an abundant number, since it is smaller than the sum of its proper divisors (2366192580).

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

1215070140 is a wasteful number, since it uses less digits than its factorization.

1215070140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065882 (or 1065880 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 1215070140 is about 34857.8562163539. The cubic root of 1215070140 is about 1067.0885243261.

Adding to 1215070140 its reverse (410705121), we get a palindrome (1625775261).

The spelling of 1215070140 in words is "one billion, two hundred fifteen million, seventy thousand, one hundred forty".