1266741252 has 36 divisors (see below), whose sum is σ = 3659475456. Its totient is φ = 361926000.

The previous prime is 1266741173. The next prime is 1266741263. The reversal of 1266741252 is 2521476621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2513124 + ... + 2513627.

It is an arithmetic number, because the mean of its divisors is an integer number (101652096).

Almost surely, 2^1266741252 is an apocalyptic number.

1266741252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266741252 is an abundant number, since it is smaller than the sum of its proper divisors (2392734204).

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

1266741252 is a wasteful number, since it uses less digits than its factorization.

1266741252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026768 (or 5026763 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1266741252 is about 35591.3086581542. The cubic root of 1266741252 is about 1082.0050919818.

The spelling of 1266741252 in words is "one billion, two hundred sixty-six million, seven hundred forty-one thousand, two hundred fifty-two".