1549420102 has 4 divisors (see below), whose sum is σ = 2324130156. Its totient is φ = 774710050.

The previous prime is 1549420087. The next prime is 1549420121. The reversal of 1549420102 is 2010249451.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 387355024 + ... + 387355027.

It is an arithmetic number, because the mean of its divisors is an integer number (581032539).

Almost surely, 2^1549420102 is an apocalyptic number.

1549420102 is a deficient number, since it is larger than the sum of its proper divisors (774710054).

1549420102 is an equidigital number, since it uses as much as digits as its factorization.

1549420102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774710053.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1549420102 is about 39362.6739691297. The cubic root of 1549420102 is about 1157.1501839311.

Adding to 1549420102 its reverse (2010249451), we get a palindrome (3559669553).

The spelling of 1549420102 in words is "one billion, five hundred forty-nine million, four hundred twenty thousand, one hundred two".