1265541426 has 48 divisors (see below), whose sum is σ = 2788928064. Its totient is φ = 414656352.

The previous prime is 1265541371. The next prime is 1265541439. The reversal of 1265541426 is 6241455621.

1265541426 is a `hidden beast` number, since 12 + 65 + 541 + 42 + 6 = 666.

It is a super-2 number, since 2×1265541426² = 3203190201844226952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786715 + ... + 788321.

It is an arithmetic number, because the mean of its divisors is an integer number (58102668).

Almost surely, 2^1265541426 is an apocalyptic number.

1265541426 is an abundant number, since it is smaller than the sum of its proper divisors (1523386638).

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

1265541426 is a wasteful number, since it uses less digits than its factorization.

1265541426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335 (or 2332 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1265541426 is about 35574.4490610888. The cubic root of 1265541426 is about 1081.6633679096.

The spelling of 1265541426 in words is "one billion, two hundred sixty-five million, five hundred forty-one thousand, four hundred twenty-six".