1212659040 has 96 divisors (see below), whose sum is σ = 4020952320. Its totient is φ = 306353664.

The previous prime is 1212659017. The next prime is 1212659081. The reversal of 1212659040 is 409562121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1212658989 and 1212659007.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 57364 + ... + 75603.

It is an arithmetic number, because the mean of its divisors is an integer number (41884920).

Almost surely, 2^1212659040 is an apocalyptic number.

1212659040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212659040 is an abundant number, since it is smaller than the sum of its proper divisors (2808293280).

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

1212659040 is a wasteful number, since it uses less digits than its factorization.

1212659040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133004 (or 132996 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1212659040 is about 34823.2542993902. The cubic root of 1212659040 is about 1066.3822383996.

It can be divided in two parts, 121265 and 9040, that added together give a triangular number (130305 = T₅₁₀).

The spelling of 1212659040 in words is "one billion, two hundred twelve million, six hundred fifty-nine thousand, forty".