102155401 has 6 divisors (see below), whose sum is σ = 104588250. Its totient is φ = 99777888.

The previous prime is 102155399. The next prime is 102155423. The reversal of 102155401 is 104551201.

It can be written as a sum of positive squares in only one way, i.e., 93605625 + 8549776 = 9675^2 + 2924^2 .

It is not a de Polignac number, because 102155401 - 2¹ = 102155399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102155461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25776 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (17431375).

Almost surely, 2^102155401 is an apocalyptic number.

It is an amenable number.

102155401 is a deficient number, since it is larger than the sum of its proper divisors (2432849).

102155401 is an frugal number, since it uses more digits than its factorization.

102155401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55335 (or 55292 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 102155401 is about 10107.1955061728. The cubic root of 102155401 is about 467.4700349692.

The spelling of 102155401 in words is "one hundred two million, one hundred fifty-five thousand, four hundred one".