1225150440 has 64 divisors (see below), whose sum is σ = 3727244160. Its totient is φ = 322103040.

The previous prime is 1225150439. The next prime is 1225150463. The reversal of 1225150440 is 440515221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1225150440.

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, 63379 + ... + 80418.

It is an arithmetic number, because the mean of its divisors is an integer number (58238190).

Almost surely, 2^1225150440 is an apocalyptic number.

1225150440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225150440 is an abundant number, since it is smaller than the sum of its proper divisors (2502093720).

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

1225150440 is a wasteful number, since it uses less digits than its factorization.

1225150440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143882 (or 143878 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1225150440 is about 35002.1490768781. The cubic root of 1225150440 is about 1070.0312798379.

Adding to 1225150440 its reverse (440515221), we get a palindrome (1665665661).

The spelling of 1225150440 in words is "one billion, two hundred twenty-five million, one hundred fifty thousand, four hundred forty".