102155942 has 8 divisors (see below), whose sum is σ = 175124496. Its totient is φ = 43781112.

The previous prime is 102155929. The next prime is 102155947. The reversal of 102155942 is 249551201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155947) 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 3 ways as a sum of consecutive naturals, for example, 3648413 + ... + 3648440.

It is an arithmetic number, because the mean of its divisors is an integer number (21890562).

Almost surely, 2^102155942 is an apocalyptic number.

102155942 is a deficient number, since it is larger than the sum of its proper divisors (72968554).

102155942 is an equidigital number, since it uses as much as digits as its factorization.

102155942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7296862.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 102155942 is about 10107.2222692489. Note that the first 4 decimals coincide. The cubic root of 102155942 is about 467.4708601853.

The spelling of 102155942 in words is "one hundred two million, one hundred fifty-five thousand, nine hundred forty-two".