1225454040 has 96 divisors (see below), whose sum is σ = 4011958080. Its totient is φ = 324389376.

The previous prime is 1225454017. The next prime is 1225454051. The reversal of 1225454040 is 404545221.

1225454040 is a `hidden beast` number, since 1 + 2 + 254 + 5 + 404 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1225453995 and 1225454013.

It is a congruent number.

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, 36897 + ... + 61743.

It is an arithmetic number, because the mean of its divisors is an integer number (41791230).

Almost surely, 2^1225454040 is an apocalyptic number.

1225454040 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 1225454040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005979040).

1225454040 is an abundant number, since it is smaller than the sum of its proper divisors (2786504040).

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

1225454040 is a wasteful number, since it uses less digits than its factorization.

1225454040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25001 (or 24994 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1225454040 is about 35006.4856847985. The cubic root of 1225454040 is about 1070.1196593695.

Adding to 1225454040 its reverse (404545221), we get a palindrome (1629999261).

The spelling of 1225454040 in words is "one billion, two hundred twenty-five million, four hundred fifty-four thousand, forty".