102137421 has 8 divisors (see below), whose sum is σ = 136233184. Its totient is φ = 68066640.

The previous prime is 102137419. The next prime is 102137459. The reversal of 102137421 is 124731201.

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

It is not a de Polignac number, because 102137421 - 2¹ = 102137419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102137491) 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, 7830 + ... + 16296.

It is an arithmetic number, because the mean of its divisors is an integer number (17029148).

Almost surely, 2^102137421 is an apocalyptic number.

It is an amenable number.

102137421 is a deficient number, since it is larger than the sum of its proper divisors (34095763).

102137421 is an equidigital number, since it uses as much as digits as its factorization.

102137421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12491.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 102137421 is about 10106.3060017001. The cubic root of 102137421 is about 467.4426074607.

Adding to 102137421 its reverse (124731201), we get a palindrome (226868622).

The spelling of 102137421 in words is "one hundred two million, one hundred thirty-seven thousand, four hundred twenty-one".