1252765154 has 4 divisors (see below), whose sum is σ = 1879147734. Its totient is φ = 626382576.

The previous prime is 1252765153. The next prime is 1252765193. The reversal of 1252765154 is 4515672521.

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., 1171350625 + 81414529 = 34225^2 + 9023^2 .

It is not an unprimeable number, because it can be changed into a prime (1252765153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313191287 + ... + 313191290.

Almost surely, 2^1252765154 is an apocalyptic number.

1252765154 is a deficient number, since it is larger than the sum of its proper divisors (626382580).

1252765154 is an equidigital number, since it uses as much as digits as its factorization.

1252765154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626382579.

The product of its digits is 84000, while the sum is 38.

The square root of 1252765154 is about 35394.4226397324. The cubic root of 1252765154 is about 1078.0110725224.

The spelling of 1252765154 in words is "one billion, two hundred fifty-two million, seven hundred sixty-five thousand, one hundred fifty-four".