1206452138 has 16 divisors (see below), whose sum is σ = 1832725440. Its totient is φ = 595563936.

The previous prime is 1206452131. The next prime is 1206452179. The reversal of 1206452138 is 8312546021.

It is a super-2 number, since 2×1206452138² = 2911053522569542088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1206452131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124745 + ... + 134067.

It is an arithmetic number, because the mean of its divisors is an integer number (114545340).

Almost surely, 2^1206452138 is an apocalyptic number.

1206452138 is a deficient number, since it is larger than the sum of its proper divisors (626273302).

1206452138 is an equidigital number, since it uses as much as digits as its factorization.

1206452138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1206452138 is about 34734.0198940462. The cubic root of 1206452138 is about 1064.5597269105.

Adding to 1206452138 its reverse (8312546021), we get a palindrome (9518998159).

The spelling of 1206452138 in words is "one billion, two hundred six million, four hundred fifty-two thousand, one hundred thirty-eight".