102054781 has 16 divisors (see below), whose sum is σ = 108174528. Its totient is φ = 96163200.

The previous prime is 102054779. The next prime is 102054809. The reversal of 102054781 is 187450201.

It is a cyclic number.

It is not a de Polignac number, because 102054781 - 2¹ = 102054779 is a prime.

It is a super-2 number, since 2×102054781² = 20830356649915922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102054751) 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, 188371 + ... + 188911.

It is an arithmetic number, because the mean of its divisors is an integer number (6760908).

Almost surely, 2^102054781 is an apocalyptic number.

It is an amenable number.

102054781 is a deficient number, since it is larger than the sum of its proper divisors (6119747).

102054781 is a wasteful number, since it uses less digits than its factorization.

102054781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 102054781 is about 10102.2166379463. The cubic root of 102054781 is about 467.3165032381.

The spelling of 102054781 in words is "one hundred two million, fifty-four thousand, seven hundred eighty-one".