1265063428 has 12 divisors (see below), whose sum is σ = 2244188380. Its totient is φ = 623866752.

The previous prime is 1265063369. The next prime is 1265063431. The reversal of 1265063428 is 8243605621.

It can be written as a sum of positive squares in 2 ways, for example, as 511121664 + 753941764 = 22608^2 + 27458^2 .

It is a super-2 number, since 2×1265063428² = 3200770953726222368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165913 + ... + 2166496.

Almost surely, 2^1265063428 is an apocalyptic number.

It is an amenable number.

1265063428 is a deficient number, since it is larger than the sum of its proper divisors (979124952).

1265063428 is a wasteful number, since it uses less digits than its factorization.

1265063428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332486 (or 4332484 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1265063428 is about 35567.7301496736. The cubic root of 1265063428 is about 1081.5271684868.

The spelling of 1265063428 in words is "one billion, two hundred sixty-five million, sixty-three thousand, four hundred twenty-eight".