1255023745 has 4 divisors (see below), whose sum is σ = 1506028500. Its totient is φ = 1004018992.

The previous prime is 1255023743. The next prime is 1255023769. The reversal of 1255023745 is 5473205521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5473205521 = 7 ⋅781886503.

It can be written as a sum of positive squares in 2 ways, for example, as 400280049 + 854743696 = 20007^2 + 29236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255023745 - 2¹ = 1255023743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255023745.

It is not an unprimeable number, because it can be changed into a prime (1255023743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125502370 + ... + 125502379.

It is an arithmetic number, because the mean of its divisors is an integer number (376507125).

Almost surely, 2^1255023745 is an apocalyptic number.

It is an amenable number.

1255023745 is a deficient number, since it is larger than the sum of its proper divisors (251004755).

1255023745 is an equidigital number, since it uses as much as digits as its factorization.

1255023745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251004754.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 1255023745 is about 35426.3143016600. The cubic root of 1255023745 is about 1078.6585267692.

The spelling of 1255023745 in words is "one billion, two hundred fifty-five million, twenty-three thousand, seven hundred forty-five".