102140554 has 4 divisors (see below), whose sum is σ = 153210834. Its totient is φ = 51070276.

The previous prime is 102140513. The next prime is 102140603. The reversal of 102140554 is 455041201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455041201 = 71 ⋅6409031.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 33698025 = 8273^2 + 5805^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25535137 + ... + 25535140.

Almost surely, 2^102140554 is an apocalyptic number.

102140554 is a deficient number, since it is larger than the sum of its proper divisors (51070280).

102140554 is an equidigital number, since it uses as much as digits as its factorization.

102140554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51070279.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 102140554 is about 10106.4610027447. The cubic root of 102140554 is about 467.4473869127.

Adding to 102140554 its reverse (455041201), we get a palindrome (557181755).

The spelling of 102140554 in words is "one hundred two million, one hundred forty thousand, five hundred fifty-four".