121402769 has 4 divisors (see below), whose sum is σ = 121652544. Its totient is φ = 121152996.

The previous prime is 121402751. The next prime is 121402817. The reversal of 121402769 is 967204121.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-121402769 is a prime.

It is a super-2 number, since 2×121402769² = 29477264641734722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121402709) 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, 124157 + ... + 125130.

It is an arithmetic number, because the mean of its divisors is an integer number (30413136).

Almost surely, 2^121402769 is an apocalyptic number.

It is an amenable number.

121402769 is a deficient number, since it is larger than the sum of its proper divisors (249775).

121402769 is an equidigital number, since it uses as much as digits as its factorization.

121402769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249774.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 121402769 is about 11018.2924720666. The cubic root of 121402769 is about 495.1569328622.

The spelling of 121402769 in words is "one hundred twenty-one million, four hundred two thousand, seven hundred sixty-nine".