1265515970 has 16 divisors (see below), whose sum is σ = 2278352448. Its totient is φ = 506112240.

The previous prime is 1265515907. The next prime is 1265515973. The reversal of 1265515970 is 795155621.

It is not an unprimeable number, because it can be changed into a prime (1265515973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75497 + ... + 90723.

It is an arithmetic number, because the mean of its divisors is an integer number (142397028).

Almost surely, 2^1265515970 is an apocalyptic number.

1265515970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265515970 is a deficient number, since it is larger than the sum of its proper divisors (1012836478).

1265515970 is a wasteful number, since it uses less digits than its factorization.

1265515970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23545.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 1265515970 is about 35574.0912744092. The cubic root of 1265515970 is about 1081.6561154123.

The spelling of 1265515970 in words is "one billion, two hundred sixty-five million, five hundred fifteen thousand, nine hundred seventy".