1265412120 has 64 divisors (see below), whose sum is σ = 4338558720. Its totient is φ = 289236864.

The previous prime is 1265412101. The next prime is 1265412131. The reversal of 1265412120 is 212145621.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 752382 + ... + 754061.

It is an arithmetic number, because the mean of its divisors is an integer number (67789980).

Almost surely, 2^1265412120 is an apocalyptic number.

1265412120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265412120 is an abundant number, since it is smaller than the sum of its proper divisors (3073146600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265412120 is a wasteful number, since it uses less digits than its factorization.

1265412120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506464 (or 1506460 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1265412120 is about 35572.6316147681. The cubic root of 1265412120 is about 1081.6265272013.

Adding to 1265412120 its reverse (212145621), we get a palindrome (1477557741).

The spelling of 1265412120 in words is "one billion, two hundred sixty-five million, four hundred twelve thousand, one hundred twenty".