102420574 has 4 divisors (see below), whose sum is σ = 153630864. Its totient is φ = 51210286.

The previous prime is 102420557. The next prime is 102420611. The reversal of 102420574 is 475024201.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25605142 + ... + 25605145.

It is an arithmetic number, because the mean of its divisors is an integer number (38407716).

Almost surely, 2^102420574 is an apocalyptic number.

102420574 is a deficient number, since it is larger than the sum of its proper divisors (51210290).

102420574 is an equidigital number, since it uses as much as digits as its factorization.

102420574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51210289.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 102420574 is about 10120.3050349285. The cubic root of 102420574 is about 467.8741686934.

Adding to 102420574 its reverse (475024201), we get a palindrome (577444775).

The spelling of 102420574 in words is "one hundred two million, four hundred twenty thousand, five hundred seventy-four".