1225122000 has 160 divisors (see below), whose sum is σ = 4182482304. Its totient is φ = 307456000.

The previous prime is 1225121993. The next prime is 1225122029. The reversal of 1225122000 is 2215221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95995 + ... + 108005.

Almost surely, 2^1225122000 is an apocalyptic number.

1225122000 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 1225122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091241152).

1225122000 is an abundant number, since it is smaller than the sum of its proper divisors (2957360304).

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

1225122000 is a wasteful number, since it uses less digits than its factorization.

1225122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12054 (or 12038 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1225122000 is about 35001.7428137514. The cubic root of 1225122000 is about 1070.0230000588.

Adding to 1225122000 its reverse (2215221), we get a palindrome (1227337221).

The spelling of 1225122000 in words is "one billion, two hundred twenty-five million, one hundred twenty-two thousand".