102021045 has 32 divisors (see below), whose sum is σ = 187833600. Its totient is φ = 46318080.

The previous prime is 102021037. The next prime is 102021083. The reversal of 102021045 is 540120201.

It is not a de Polignac number, because 102021045 - 2³ = 102021037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12385 + ... + 18905.

It is an arithmetic number, because the mean of its divisors is an integer number (5869800).

Almost surely, 2^102021045 is an apocalyptic number.

102021045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102021045 is a deficient number, since it is larger than the sum of its proper divisors (85812555).

102021045 is a wasteful number, since it uses less digits than its factorization.

102021045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 102021045 is about 10100.5467673785. The cubic root of 102021045 is about 467.2650043376.

Adding to 102021045 its reverse (540120201), we get a palindrome (642141246).

It can be divided in two parts, 10 and 2021045, that added together give a triangular number (2021055 = T₂₀₁₀).

The spelling of 102021045 in words is "one hundred two million, twenty-one thousand, forty-five".