7265129290921 has 4 divisors (see below), whose sum is σ = 7265230207312. Its totient is φ = 7265028374532.

The previous prime is 7265129290907. The next prime is 7265129290927. The reversal of 7265129290921 is 1290929215627.

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 7265129290921 - 2²³ = 7265120902313 is a prime.

It is a super-2 number, since 2×7265129290921² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7265129290927) 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, 50350131 + ... + 50494216.

It is an arithmetic number, because the mean of its divisors is an integer number (1816307551828).

Almost surely, 2^{7265129290921} is an apocalyptic number.

It is an amenable number.

7265129290921 is a deficient number, since it is larger than the sum of its proper divisors (100916391).

7265129290921 is a wasteful number, since it uses less digits than its factorization.

7265129290921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100916390.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 7265129290921 in words is "seven trillion, two hundred sixty-five billion, one hundred twenty-nine million, two hundred ninety thousand, nine hundred twenty-one".