1612745258 has 4 divisors (see below), whose sum is σ = 2419117890. Its totient is φ = 806372628.

The previous prime is 1612745243. The next prime is 1612745261. The reversal of 1612745258 is 8525472161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1358438449 + 254306809 = 36857^2 + 15947^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403186313 + ... + 403186316.

Almost surely, 2^1612745258 is an apocalyptic number.

1612745258 is a deficient number, since it is larger than the sum of its proper divisors (806372632).

1612745258 is an equidigital number, since it uses as much as digits as its factorization.

1612745258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806372631.

The product of its digits is 134400, while the sum is 41.

The square root of 1612745258 is about 40158.9997136383. Note that the first 3 decimals coincide. The cubic root of 1612745258 is about 1172.7044987407.

The spelling of 1612745258 in words is "one billion, six hundred twelve million, seven hundred forty-five thousand, two hundred fifty-eight".