1206412251 has 16 divisors (see below), whose sum is σ = 1780975488. Its totient is φ = 720244800.

The previous prime is 1206412247. The next prime is 1206412279. The reversal of 1206412251 is 1522146021.

It is not a de Polignac number, because 1206412251 - 2² = 1206412247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1206412651) 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, 270610 + ... + 275031.

It is an arithmetic number, because the mean of its divisors is an integer number (111310968).

Almost surely, 2^1206412251 is an apocalyptic number.

1206412251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1206412251 is a deficient number, since it is larger than the sum of its proper divisors (574563237).

1206412251 is a wasteful number, since it uses less digits than its factorization.

1206412251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545722.

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

The square root of 1206412251 is about 34733.4457115904. The cubic root of 1206412251 is about 1064.5479948353.

Adding to 1206412251 its reverse (1522146021), we get a palindrome (2728558272).

The spelling of 1206412251 in words is "one billion, two hundred six million, four hundred twelve thousand, two hundred fifty-one".