1265531254 has 32 divisors (see below), whose sum is σ = 2168236224. Its totient is φ = 549521280.

The previous prime is 1265531227. The next prime is 1265531269. The reversal of 1265531254 is 4521355621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19132 + ... + 53824.

It is an arithmetic number, because the mean of its divisors is an integer number (67757382).

Almost surely, 2^1265531254 is an apocalyptic number.

1265531254 is a deficient number, since it is larger than the sum of its proper divisors (902704970).

1265531254 is a wasteful number, since it uses less digits than its factorization.

1265531254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34792.

The product of its digits is 36000, while the sum is 34.

The square root of 1265531254 is about 35574.3060930217. The cubic root of 1265531254 is about 1081.6604698853.

Adding to 1265531254 its reverse (4521355621), we get a palindrome (5786886875).

The spelling of 1265531254 in words is "one billion, two hundred sixty-five million, five hundred thirty-one thousand, two hundred fifty-four".