1254521440 has 48 divisors (see below), whose sum is σ = 3066018480. Its totient is φ = 484503040.

The previous prime is 1254521419. The next prime is 1254521449. The reversal of 1254521440 is 441254521.

It is a junction number, because it is equal to n+sod(n) for n = 1254521399 and 1254521408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254521449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130546 + ... + 139825.

It is an arithmetic number, because the mean of its divisors is an integer number (63875385).

Almost surely, 2^1254521440 is an apocalyptic number.

1254521440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1254521440 is an abundant number, since it is smaller than the sum of its proper divisors (1811497040).

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

1254521440 is a wasteful number, since it uses less digits than its factorization.

1254521440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270415 (or 270407 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1254521440 is about 35419.2241586402. The cubic root of 1254521440 is about 1078.5146017706.

Adding to 1254521440 its reverse (441254521), we get a palindrome (1695775961).

The spelling of 1254521440 in words is "one billion, two hundred fifty-four million, five hundred twenty-one thousand, four hundred forty".