102735021 has 4 divisors (see below), whose sum is σ = 136980032. Its totient is φ = 68490012.

The previous prime is 102734987. The next prime is 102735037. The reversal of 102735021 is 120537201.

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.

It is not a de Polignac number, because 102735021 - 2¹³ = 102726829 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 (102735221) 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, 17122501 + ... + 17122506.

It is an arithmetic number, because the mean of its divisors is an integer number (34245008).

Almost surely, 2^102735021 is an apocalyptic number.

It is an amenable number.

102735021 is a deficient number, since it is larger than the sum of its proper divisors (34245011).

102735021 is an equidigital number, since it uses as much as digits as its factorization.

102735021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34245010.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 102735021 is about 10135.8285798449. The cubic root of 102735021 is about 468.3524948644.

The spelling of 102735021 in words is "one hundred two million, seven hundred thirty-five thousand, twenty-one".