101620401 has 8 divisors (see below), whose sum is σ = 136891104. Its totient is φ = 67048320.

The previous prime is 101620391. The next prime is 101620423. The reversal of 101620401 is 104026101.

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

It is not a de Polignac number, because 101620401 - 2¹⁴ = 101604017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (101620471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174315 + ... + 174896.

It is an arithmetic number, because the mean of its divisors is an integer number (17111388).

Almost surely, 2^101620401 is an apocalyptic number.

It is an amenable number.

101620401 is a deficient number, since it is larger than the sum of its proper divisors (35270703).

101620401 is an equidigital number, since it uses as much as digits as its factorization.

101620401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349311.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 101620401 is about 10080.6944701246. The cubic root of 101620401 is about 466.6525407856.

Adding to 101620401 its reverse (104026101), we get a palindrome (205646502).

The spelling of 101620401 in words is "one hundred one million, six hundred twenty thousand, four hundred one".