1200252545 has 4 divisors (see below), whose sum is σ = 1440303060. Its totient is φ = 960202032.

The previous prime is 1200252497. The next prime is 1200252569. The reversal of 1200252545 is 5452520021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5452520021 = 13 ⋅419424617.

It can be written as a sum of positive squares in 2 ways, for example, as 533425216 + 666827329 = 23096^2 + 25823^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200252545 - 2⁶ = 1200252481 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120025250 + ... + 120025259.

It is an arithmetic number, because the mean of its divisors is an integer number (360075765).

Almost surely, 2^1200252545 is an apocalyptic number.

It is an amenable number.

1200252545 is a deficient number, since it is larger than the sum of its proper divisors (240050515).

1200252545 is an equidigital number, since it uses as much as digits as its factorization.

1200252545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240050514.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1200252545 is about 34644.6611327056. The cubic root of 1200252545 is about 1062.7331109282.

Adding to 1200252545 its reverse (5452520021), we get a palindrome (6652772566).

The spelling of 1200252545 in words is "one billion, two hundred million, two hundred fifty-two thousand, five hundred forty-five".