1265530004 has 6 divisors (see below), whose sum is σ = 2214677514. Its totient is φ = 632765000.

The previous prime is 1265529983. The next prime is 1265530009. The reversal of 1265530004 is 4000355621.

It can be written as a sum of positive squares in only one way, i.e., 1236928900 + 28601104 = 35170^2 + 5348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265530009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158191247 + ... + 158191254.

It is an arithmetic number, because the mean of its divisors is an integer number (369112919).

Almost surely, 2^1265530004 is an apocalyptic number.

It is an amenable number.

1265530004 is a deficient number, since it is larger than the sum of its proper divisors (949147510).

1265530004 is a wasteful number, since it uses less digits than its factorization.

1265530004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316382505 (or 316382503 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1265530004 is about 35574.2885241574. The cubic root of 1265530004 is about 1081.6601137566.

Adding to 1265530004 its reverse (4000355621), we get a palindrome (5265885625).

The spelling of 1265530004 in words is "one billion, two hundred sixty-five million, five hundred thirty thousand, four".