1249006445 has 8 divisors (see below), whose sum is σ = 1499733144. Its totient is φ = 998588224.

The previous prime is 1249006441. The next prime is 1249006453. The reversal of 1249006445 is 5446009421.

It can be written as a sum of positive squares in 4 ways, for example, as 20164 + 1248986281 = 142^2 + 35341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1249006445 - 2² = 1249006441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249006441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68114 + ... + 84483.

It is an arithmetic number, because the mean of its divisors is an integer number (187466643).

Almost surely, 2^1249006445 is an apocalyptic number.

It is an amenable number.

1249006445 is a deficient number, since it is larger than the sum of its proper divisors (250726699).

1249006445 is a wasteful number, since it uses less digits than its factorization.

1249006445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154239.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1249006445 is about 35341.2852765714. The cubic root of 1249006445 is about 1076.9318627835.

The spelling of 1249006445 in words is "one billion, two hundred forty-nine million, six thousand, four hundred forty-five".