1212359145 has 16 divisors (see below), whose sum is σ = 1955051520. Its totient is φ = 641499264.

The previous prime is 1212359119. The next prime is 1212359167. The reversal of 1212359145 is 5419532121.

It is a happy number.

1212359145 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1212359145 - 2⁷ = 1212359017 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316300 + ... + 320109.

It is an arithmetic number, because the mean of its divisors is an integer number (122190720).

Almost surely, 2^1212359145 is an apocalyptic number.

1212359145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212359145 is a deficient number, since it is larger than the sum of its proper divisors (742692375).

1212359145 is a wasteful number, since it uses less digits than its factorization.

1212359145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636544.

The product of its digits is 10800, while the sum is 33.

The square root of 1212359145 is about 34818.9480742885. The cubic root of 1212359145 is about 1066.2943244141.

The spelling of 1212359145 in words is "one billion, two hundred twelve million, three hundred fifty-nine thousand, one hundred forty-five".