1620098 has 4 divisors (see below), whose sum is σ = 2430150. Its totient is φ = 810048.

The previous prime is 1620071. The next prime is 1620103. The reversal of 1620098 is 8900261.

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

It can be written as a sum of positive squares in only one way, i.e., 822649 + 797449 = 907^2 + 893^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405023 + ... + 405026.

2^1620098 is an apocalyptic number.

1620098 is a deficient number, since it is larger than the sum of its proper divisors (810052).

1620098 is an equidigital number, since it uses as much as digits as its factorization.

1620098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810051.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1620098 is about 1272.8307035894. The cubic root of 1620098 is about 117.4483974406.

It can be divided in two parts, 16200 and 98, that multiplied together give a square (1587600 = 1260²).

The spelling of 1620098 in words is "one million, six hundred twenty thousand, ninety-eight".