121792261 has 4 divisors (see below), whose sum is σ = 128202400. Its totient is φ = 115382124.

The previous prime is 121792259. The next prime is 121792277. The reversal of 121792261 is 162297121.

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 121792261 - 2¹ = 121792259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121792361) 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, 3205041 + ... + 3205078.

It is an arithmetic number, because the mean of its divisors is an integer number (32050600).

Almost surely, 2^121792261 is an apocalyptic number.

It is an amenable number.

121792261 is a deficient number, since it is larger than the sum of its proper divisors (6410139).

121792261 is an equidigital number, since it uses as much as digits as its factorization.

121792261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410138.

The product of its digits is 3024, while the sum is 31.

The square root of 121792261 is about 11035.9531079105. The cubic root of 121792261 is about 495.6858987837.

The spelling of 121792261 in words is "one hundred twenty-one million, seven hundred ninety-two thousand, two hundred sixty-one".