1620148 has 6 divisors (see below), whose sum is σ = 2835266. Its totient is φ = 810072.

The previous prime is 1620133. The next prime is 1620161. The reversal of 1620148 is 8410261.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 338724 = 1132^2 + 582^2 .

It is an Ulam number.

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, 202515 + ... + 202522.

2^1620148 is an apocalyptic number.

It is an amenable number.

1620148 is a deficient number, since it is larger than the sum of its proper divisors (1215118).

1620148 is a wasteful number, since it uses less digits than its factorization.

1620148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405041 (or 405039 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1620148 is about 1272.8503446989. The cubic root of 1620148 is about 117.4496056719.

It can be divided in two parts, 16 and 20148, that added together give a square (20164 = 142²).

The spelling of 1620148 in words is "one million, six hundred twenty thousand, one hundred forty-eight".