118721401 has 4 divisors (see below), whose sum is σ = 118893904. Its totient is φ = 118548900.

The previous prime is 118721399. The next prime is 118721411. The reversal of 118721401 is 104127811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104127811 = 43 ⋅2421577.

It is a cyclic number.

It is not a de Polignac number, because 118721401 - 2¹ = 118721399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118721411) 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, 85215 + ... + 86596.

It is an arithmetic number, because the mean of its divisors is an integer number (29723476).

Almost surely, 2^118721401 is an apocalyptic number.

It is an amenable number.

118721401 is a deficient number, since it is larger than the sum of its proper divisors (172503).

118721401 is an equidigital number, since it uses as much as digits as its factorization.

118721401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172502.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 118721401 is about 10895.9350677214. The cubic root of 118721401 is about 491.4843245829.

The spelling of 118721401 in words is "one hundred eighteen million, seven hundred twenty-one thousand, four hundred one".