1249051379 has 8 divisors (see below), whose sum is σ = 1253960400. Its totient is φ = 1244152800.

The previous prime is 1249051343. The next prime is 1249051423. The reversal of 1249051379 is 9731509421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249051379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249051079) 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, 302672 + ... + 306770.

It is an arithmetic number, because the mean of its divisors is an integer number (156745050).

Almost surely, 2^1249051379 is an apocalyptic number.

1249051379 is a deficient number, since it is larger than the sum of its proper divisors (4909021).

1249051379 is an equidigital number, since it uses as much as digits as its factorization.

1249051379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1249051379 is about 35341.9209862735. The cubic root of 1249051379 is about 1076.9447771220.

The spelling of 1249051379 in words is "one billion, two hundred forty-nine million, fifty-one thousand, three hundred seventy-nine".