1225163740 has 48 divisors (see below), whose sum is σ = 2644598880. Its totient is φ = 476501760.

The previous prime is 1225163707. The next prime is 1225163743. The reversal of 1225163740 is 473615221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225163743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193830 + ... + 200050.

It is an arithmetic number, because the mean of its divisors is an integer number (55095810).

Almost surely, 2^1225163740 is an apocalyptic number.

1225163740 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 1225163740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322299440).

1225163740 is an abundant number, since it is smaller than the sum of its proper divisors (1419435140).

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

1225163740 is a wasteful number, since it uses less digits than its factorization.

1225163740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502 (or 6500 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1225163740 is about 35002.3390646968. The cubic root of 1225163740 is about 1070.0351518425.

Adding to 1225163740 its reverse (473615221), we get a palindrome (1698778961).

The spelling of 1225163740 in words is "one billion, two hundred twenty-five million, one hundred sixty-three thousand, seven hundred forty".