1212622560 has 576 divisors, whose sum is σ = 4755179520. Its totient is φ = 279797760.

The previous prime is 1212622553. The next prime is 1212622573. The reversal of 1212622560 is 652262121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25800457 + ... + 25800503.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^1212622560 is an apocalyptic number.

1212622560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212622560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2377589760).

1212622560 is an abundant number, since it is smaller than the sum of its proper divisors (3542556960).

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

1212622560 is a wasteful number, since it uses less digits than its factorization.

1212622560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1212622560 is about 34822.7305075291. The cubic root of 1212622560 is about 1066.3715450904.

Adding to 1212622560 its reverse (652262121), we get a palindrome (1864884681).

The spelling of 1212622560 in words is "one billion, two hundred twelve million, six hundred twenty-two thousand, five hundred sixty".