1254921668 has 72 divisors (see below), whose sum is σ = 2964951360. Its totient is φ = 451301760.

The previous prime is 1254921641. The next prime is 1254921673. The reversal of 1254921668 is 8661294521.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 39998 + ... + 64106.

It is an arithmetic number, because the mean of its divisors is an integer number (41179880).

Almost surely, 2^1254921668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1254921668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482475680).

1254921668 is an abundant number, since it is smaller than the sum of its proper divisors (1710029692).

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

1254921668 is a wasteful number, since it uses less digits than its factorization.

1254921668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24157 (or 24142 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 1254921668 is about 35424.8735777561. The cubic root of 1254921668 is about 1078.6292818479.

The spelling of 1254921668 in words is "one billion, two hundred fifty-four million, nine hundred twenty-one thousand, six hundred sixty-eight".