1371604 has 18 divisors (see below), whose sum is σ = 2600430. Its totient is φ = 632736.

The previous prime is 1371599. The next prime is 1371607. The reversal of 1371604 is 4061731.

It can be written as a sum of positive squares in 3 ways, for example, as 161604 + 1210000 = 402^2 + 1100^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339 + ... + 1690.

2^1371604 is an apocalyptic number.

It is an amenable number.

1371604 is a deficient number, since it is larger than the sum of its proper divisors (1228826).

1371604 is a wasteful number, since it uses less digits than its factorization.

1371604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1371604 is about 1171.1549854737. The cubic root of 1371604 is about 111.1073819489.

It can be divided in two parts, 13 and 71604, that added together give a palindrome (71617).

The spelling of 1371604 in words is "one million, three hundred seventy-one thousand, six hundred four".