102120454 has 4 divisors (see below), whose sum is σ = 153180684. Its totient is φ = 51060226.

The previous prime is 102120449. The next prime is 102120467. The reversal of 102120454 is 454021201.

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

It is a super-2 number, since 2×102120454² = 20857174250332232, which contains 22 as substring.

It is a congruent number.

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, 25530112 + ... + 25530115.

It is an arithmetic number, because the mean of its divisors is an integer number (38295171).

Almost surely, 2^102120454 is an apocalyptic number.

102120454 is a deficient number, since it is larger than the sum of its proper divisors (51060230).

102120454 is an equidigital number, since it uses as much as digits as its factorization.

102120454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060229.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102120454 is about 10105.4665404424. The cubic root of 102120454 is about 467.4167222763.

Adding to 102120454 its reverse (454021201), we get a palindrome (556141655).

The spelling of 102120454 in words is "one hundred two million, one hundred twenty thousand, four hundred fifty-four".