1604720102 has 4 divisors (see below), whose sum is σ = 2407080156. Its totient is φ = 802360050.

The previous prime is 1604720101. The next prime is 1604720153. The reversal of 1604720102 is 2010274061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2010274061 = 89 ⋅22587349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604720101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401180024 + ... + 401180027.

It is an arithmetic number, because the mean of its divisors is an integer number (601770039).

Almost surely, 2^1604720102 is an apocalyptic number.

1604720102 is a deficient number, since it is larger than the sum of its proper divisors (802360054).

1604720102 is an equidigital number, since it uses as much as digits as its factorization.

1604720102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802360053.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1604720102 is about 40058.9578246864. The cubic root of 1604720102 is about 1170.7561046390.

Adding to 1604720102 its reverse (2010274061), we get a palindrome (3614994163).

The spelling of 1604720102 in words is "one billion, six hundred four million, seven hundred twenty thousand, one hundred two".