1214954991 has 8 divisors (see below), whose sum is σ = 1799933360. Its totient is φ = 809969976.

The previous prime is 1214954989. The next prime is 1214954999. The reversal of 1214954991 is 1994594121.

1214954991 is a `hidden beast` number, since 1 + 2 + 14 + 9 + 549 + 91 = 666.

It is not a de Polignac number, because 1214954991 - 2¹ = 1214954989 is a prime.

It is a super-2 number, since 2×1214954991² = 2952231260311620162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214954999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22499140 + ... + 22499193.

It is an arithmetic number, because the mean of its divisors is an integer number (224991670).

Almost surely, 2^1214954991 is an apocalyptic number.

1214954991 is a deficient number, since it is larger than the sum of its proper divisors (584978369).

1214954991 is an equidigital number, since it uses as much as digits as its factorization.

1214954991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44998342 (or 44998336 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1214954991 is about 34856.2044835636. The cubic root of 1214954991 is about 1067.0548148707.

The spelling of 1214954991 in words is "one billion, two hundred fourteen million, nine hundred fifty-four thousand, nine hundred ninety-one".