1249921466 has 4 divisors (see below), whose sum is σ = 1874882202. Its totient is φ = 624960732.

The previous prime is 1249921459. The next prime is 1249921469. The reversal of 1249921466 is 6641299421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 825355441 + 424566025 = 28729^2 + 20605^2 .

It is not an unprimeable number, because it can be changed into a prime (1249921469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312480365 + ... + 312480368.

Almost surely, 2^1249921466 is an apocalyptic number.

1249921466 is a deficient number, since it is larger than the sum of its proper divisors (624960736).

1249921466 is an equidigital number, since it uses as much as digits as its factorization.

1249921466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624960735.

The product of its digits is 186624, while the sum is 44.

The square root of 1249921466 is about 35354.2284034032. The cubic root of 1249921466 is about 1077.1947850269.

The spelling of 1249921466 in words is "one billion, two hundred forty-nine million, nine hundred twenty-one thousand, four hundred sixty-six".