102012551 has 4 divisors (see below), whose sum is σ = 104500704. Its totient is φ = 99524400.

The previous prime is 102012523. The next prime is 102012553. The reversal of 102012551 is 155210201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102012551 - 2⁶ = 102012487 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 (102012553) 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, 1244015 + ... + 1244096.

It is an arithmetic number, because the mean of its divisors is an integer number (26125176).

Almost surely, 2^102012551 is an apocalyptic number.

102012551 is a deficient number, since it is larger than the sum of its proper divisors (2488153).

102012551 is an equidigital number, since it uses as much as digits as its factorization.

102012551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488152.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 102012551 is about 10100.1262863392. The cubic root of 102012551 is about 467.2520362318.

Adding to 102012551 its reverse (155210201), we get a palindrome (257222752).

The spelling of 102012551 in words is "one hundred two million, twelve thousand, five hundred fifty-one".