1265422530 has 16 divisors (see below), whose sum is σ = 3037014144. Its totient is φ = 337446000.

The previous prime is 1265422519. The next prime is 1265422547. The reversal of 1265422530 is 352245621.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 42180751 = 1265422530 / (1 + 2 + 6 + 5 + 4 + 2 + 2 + 5 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21090346 + ... + 21090405.

It is an arithmetic number, because the mean of its divisors is an integer number (189813384).

Almost surely, 2^1265422530 is an apocalyptic number.

1265422530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265422530 is an abundant number, since it is smaller than the sum of its proper divisors (1771591614).

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

1265422530 is a wasteful number, since it uses less digits than its factorization.

1265422530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42180761.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1265422530 is about 35572.7779348198. Note that the first 3 decimals coincide. The cubic root of 1265422530 is about 1081.6294932182.

The spelling of 1265422530 in words is "one billion, two hundred sixty-five million, four hundred twenty-two thousand, five hundred thirty".