1212278958 has 24 divisors (see below), whose sum is σ = 2865387096. Its totient is φ = 367357200.

The previous prime is 1212278957. The next prime is 1212278981. The reversal of 1212278958 is 8598722121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212278957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3061113 + ... + 3061508.

It is an arithmetic number, because the mean of its divisors is an integer number (119391129).

Almost surely, 2^1212278958 is an apocalyptic number.

1212278958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1212278958 is an abundant number, since it is smaller than the sum of its proper divisors (1653108138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212278958 is a wasteful number, since it uses less digits than its factorization.

1212278958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122640 (or 6122637 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 1212278958 is about 34817.7965701450. The cubic root of 1212278958 is about 1066.2708152011.

The spelling of 1212278958 in words is "one billion, two hundred twelve million, two hundred seventy-eight thousand, nine hundred fifty-eight".