1206245121 has 16 divisors (see below), whose sum is σ = 1639197120. Its totient is φ = 788875200.

The previous prime is 1206245113. The next prime is 1206245167. The reversal of 1206245121 is 1215426021.

It is not a de Polignac number, because 1206245121 - 2³ = 1206245113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1206245091 and 1206245100.

It is not an unprimeable number, because it can be changed into a prime (1206240121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14766 + ... + 51288.

It is an arithmetic number, because the mean of its divisors is an integer number (102449820).

Almost surely, 2^1206245121 is an apocalyptic number.

It is an amenable number.

1206245121 is a deficient number, since it is larger than the sum of its proper divisors (432951999).

1206245121 is a wasteful number, since it uses less digits than its factorization.

1206245121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36736.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1206245121 is about 34731.0397339325. The cubic root of 1206245121 is about 1064.4988336074.

Subtracting 1206245121 from its reverse (1215426021), we obtain a square (9180900 = 3030²).

The spelling of 1206245121 in words is "one billion, two hundred six million, two hundred forty-five thousand, one hundred twenty-one".