102021243 has 16 divisors (see below), whose sum is σ = 140042112. Its totient is φ = 66024000.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021243 is 342120201.

It is not a de Polignac number, because 102021243 - 2⁸ = 102020987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102021253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23988 + ... + 27918.

It is an arithmetic number, because the mean of its divisors is an integer number (8752632).

Almost surely, 2^102021243 is an apocalyptic number.

102021243 is a deficient number, since it is larger than the sum of its proper divisors (38020869).

102021243 is a wasteful number, since it uses less digits than its factorization.

102021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 102021243 is about 10100.5565688233. The cubic root of 102021243 is about 467.2653066230.

Adding to 102021243 its reverse (342120201), we get a palindrome (444141444).

The spelling of 102021243 in words is "one hundred two million, twenty-one thousand, two hundred forty-three".