121264491 has 8 divisors (see below), whose sum is σ = 163197504. Its totient is φ = 80087240.

The previous prime is 121264483. The next prime is 121264499. The reversal of 121264491 is 194462121.

It is an interprime number because it is at equal distance from previous prime (121264483) and next prime (121264499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121264491 - 2³ = 121264483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121264499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188565 + ... + 189206.

It is an arithmetic number, because the mean of its divisors is an integer number (20399688).

Almost surely, 2^121264491 is an apocalyptic number.

121264491 is a deficient number, since it is larger than the sum of its proper divisors (41933013).

121264491 is a wasteful number, since it uses less digits than its factorization.

121264491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377881.

The product of its digits is 3456, while the sum is 30.

The square root of 121264491 is about 11012.0157555281. The cubic root of 121264491 is about 494.9688665247.

It can be divided in two parts, 1212 and 64491, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 121264491 in words is "one hundred twenty-one million, two hundred sixty-four thousand, four hundred ninety-one".