1265373197 has 4 divisors (see below), whose sum is σ = 1380407136. Its totient is φ = 1150339260.

The previous prime is 1265373157. The next prime is 1265373227. The reversal of 1265373197 is 7913735621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1265373197 - 2¹⁶ = 1265307661 is a prime.

It is a super-3 number, since 3×1265373197³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265373107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57516953 + ... + 57516974.

It is an arithmetic number, because the mean of its divisors is an integer number (345101784).

Almost surely, 2^1265373197 is an apocalyptic number.

It is an amenable number.

1265373197 is a deficient number, since it is larger than the sum of its proper divisors (115033939).

1265373197 is a wasteful number, since it uses less digits than its factorization.

1265373197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115033938.

The product of its digits is 238140, while the sum is 44.

The square root of 1265373197 is about 35572.0845186222. The cubic root of 1265373197 is about 1081.6154371171.

The spelling of 1265373197 in words is "one billion, two hundred sixty-five million, three hundred seventy-three thousand, one hundred ninety-seven".