121487819 has 8 divisors (see below), whose sum is σ = 124761600. Its totient is φ = 118250496.

The previous prime is 121487813. The next prime is 121487833. The reversal of 121487819 is 918784121.

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 121487819 - 2⁸ = 121487563 is a prime.

It is a super-2 number, since 2×121487819² = 29518580330753522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121487813) 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, 2294 + ... + 15755.

It is an arithmetic number, because the mean of its divisors is an integer number (15595200).

Almost surely, 2^121487819 is an apocalyptic number.

121487819 is a deficient number, since it is larger than the sum of its proper divisors (3273781).

121487819 is a wasteful number, since it uses less digits than its factorization.

121487819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18229.

The product of its digits is 32256, while the sum is 41.

The square root of 121487819 is about 11022.1512872941. The cubic root of 121487819 is about 495.2725350214.

The spelling of 121487819 in words is "one hundred twenty-one million, four hundred eighty-seven thousand, eight hundred nineteen".