1249154867 has 8 divisors (see below), whose sum is σ = 1318808400. Its totient is φ = 1179892224.

The previous prime is 1249154857. The next prime is 1249154887. The reversal of 1249154867 is 7684519421.

It is a happy number.

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 1249154867 - 2¹⁴ = 1249138483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249154807) 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, 91142 + ... + 103947.

It is an arithmetic number, because the mean of its divisors is an integer number (164851050).

Almost surely, 2^1249154867 is an apocalyptic number.

1249154867 is a deficient number, since it is larger than the sum of its proper divisors (69653533).

1249154867 is a wasteful number, since it uses less digits than its factorization.

1249154867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195445.

The product of its digits is 483840, while the sum is 47.

The square root of 1249154867 is about 35343.3850529346. The cubic root of 1249154867 is about 1076.9745191019.

The spelling of 1249154867 in words is "one billion, two hundred forty-nine million, one hundred fifty-four thousand, eight hundred sixty-seven".