1225907144 has 96 divisors (see below), whose sum is σ = 2903826240. Its totient is φ = 474925440.

The previous prime is 1225907131. The next prime is 1225907161. The reversal of 1225907144 is 4417095221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1537754 + ... + 1538550.

It is an arithmetic number, because the mean of its divisors is an integer number (30248190).

Almost surely, 2^1225907144 is an apocalyptic number.

1225907144 is a gapful number since it is divisible by the number (14) 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 1225907144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451913120).

1225907144 is an abundant number, since it is smaller than the sum of its proper divisors (1677919096).

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

1225907144 is a wasteful number, since it uses less digits than its factorization.

1225907144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1225907144 is about 35012.9568017327. The cubic root of 1225907144 is about 1070.2515331443.

The spelling of 1225907144 in words is "one billion, two hundred twenty-five million, nine hundred seven thousand, one hundred forty-four".