1212472605 has 32 divisors (see below), whose sum is σ = 1966374144. Its totient is φ = 637907456.

The previous prime is 1212472561. The next prime is 1212472607. The reversal of 1212472605 is 5062742121.

It is a cyclic number.

It is not a de Polignac number, because 1212472605 - 2²⁵ = 1178918173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212472607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341419 + ... + 344951.

It is an arithmetic number, because the mean of its divisors is an integer number (61449192).

Almost surely, 2^1212472605 is an apocalyptic number.

1212472605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212472605 is a deficient number, since it is larger than the sum of its proper divisors (753901539).

1212472605 is a wasteful number, since it uses less digits than its factorization.

1212472605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1212472605 is about 34820.5773214632. The cubic root of 1212472605 is about 1066.3275868294.

The spelling of 1212472605 in words is "one billion, two hundred twelve million, four hundred seventy-two thousand, six hundred five".