1256162445 has 32 divisors (see below), whose sum is σ = 2239885440. Its totient is φ = 667941120.

The previous prime is 1256162441. The next prime is 1256162471. The reversal of 1256162445 is 5442616521.

1256162445 is a `hidden beast` number, since 1 + 2 + 56 + 162 + 445 = 666.

1256162445 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1256162445 - 2² = 1256162441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256162441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31690 + ... + 59300.

It is an arithmetic number, because the mean of its divisors is an integer number (69996420).

Almost surely, 2^1256162445 is an apocalyptic number.

1256162445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256162445 is a deficient number, since it is larger than the sum of its proper divisors (983722995).

1256162445 is a wasteful number, since it uses less digits than its factorization.

1256162445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27962 (or 27956 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1256162445 is about 35442.3820446651. The cubic root of 1256162445 is about 1078.9846553070.

Adding to 1256162445 its reverse (5442616521), we get a palindrome (6698778966).

The spelling of 1256162445 in words is "one billion, two hundred fifty-six million, one hundred sixty-two thousand, four hundred forty-five".