1254921667 has 16 divisors (see below), whose sum is σ = 1302884352. Its totient is φ = 1208015200.

The previous prime is 1254921641. The next prime is 1254921673. The reversal of 1254921667 is 7661294521.

It is a cyclic number.

It is not a de Polignac number, because 1254921667 - 2⁷ = 1254921539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1254921617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791958 + ... + 793540.

It is an arithmetic number, because the mean of its divisors is an integer number (81430272).

Almost surely, 2^1254921667 is an apocalyptic number.

1254921667 is a deficient number, since it is larger than the sum of its proper divisors (47962685).

1254921667 is a wasteful number, since it uses less digits than its factorization.

1254921667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898.

The product of its digits is 181440, while the sum is 43.

The square root of 1254921667 is about 35424.8735636417. The cubic root of 1254921667 is about 1078.6292815614.

The spelling of 1254921667 in words is "one billion, two hundred fifty-four million, nine hundred twenty-one thousand, six hundred sixty-seven".