1254012640 has 96 divisors (see below), whose sum is σ = 3056901120. Its totient is φ = 485865984.

The previous prime is 1254012637. The next prime is 1254012671. The reversal of 1254012640 is 462104521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773751 + ... + 775369.

It is an arithmetic number, because the mean of its divisors is an integer number (31842720).

Almost surely, 2^1254012640 is an apocalyptic number.

1254012640 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 1254012640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528450560).

1254012640 is an abundant number, since it is smaller than the sum of its proper divisors (1802888480).

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

1254012640 is a wasteful number, since it uses less digits than its factorization.

1254012640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1254012640 is about 35412.0408900701. The cubic root of 1254012640 is about 1078.3687765940.

The spelling of 1254012640 in words is "one billion, two hundred fifty-four million, twelve thousand, six hundred forty".