1254525640 has 16 divisors (see below), whose sum is σ = 2822682780. Its totient is φ = 501810240.

The previous prime is 1254525637. The next prime is 1254525647. The reversal of 1254525640 is 465254521.

It can be written as a sum of positive squares in 2 ways, for example, as 1165676164 + 88849476 = 34142^2 + 9426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1254525596 and 1254525605.

It is not an unprimeable number, because it can be changed into a prime (1254525647) 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 3 ways as a sum of consecutive naturals, for example, 15681531 + ... + 15681610.

Almost surely, 2^1254525640 is an apocalyptic number.

1254525640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1254525640 is an abundant number, since it is smaller than the sum of its proper divisors (1568157140).

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

1254525640 is a wasteful number, since it uses less digits than its factorization.

1254525640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31363152 (or 31363148 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 1254525640 is about 35419.2834484268. The cubic root of 1254525640 is about 1078.5158053521.

The spelling of 1254525640 in words is "one billion, two hundred fifty-four million, five hundred twenty-five thousand, six hundred forty".