1258796345 has 4 divisors (see below), whose sum is σ = 1510555620. Its totient is φ = 1007037072.

The previous prime is 1258796339. The next prime is 1258796369. The reversal of 1258796345 is 5436978521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5436978521 = 13 ⋅418229117.

It can be written as a sum of positive squares in 2 ways, for example, as 156025081 + 1102771264 = 12491^2 + 33208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258796345 - 2¹⁸ = 1258534201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1258796293 and 1258796302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125879630 + ... + 125879639.

It is an arithmetic number, because the mean of its divisors is an integer number (377638905).

Almost surely, 2^1258796345 is an apocalyptic number.

It is an amenable number.

1258796345 is a deficient number, since it is larger than the sum of its proper divisors (251759275).

1258796345 is an equidigital number, since it uses as much as digits as its factorization.

1258796345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251759274.

The product of its digits is 1814400, while the sum is 50.

The square root of 1258796345 is about 35479.5200784904. The cubic root of 1258796345 is about 1079.7382610466.

The spelling of 1258796345 in words is "one billion, two hundred fifty-eight million, seven hundred ninety-six thousand, three hundred forty-five".