1980427 has 4 divisors (see below), whose sum is σ = 2084680. Its totient is φ = 1876176.

The previous prime is 1980413. The next prime is 1980431. The reversal of 1980427 is 7240891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980427 is a prime.

It is a super-2 number, since 2×1980427² = 7844182204658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1980227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52098 + ... + 52135.

It is an arithmetic number, because the mean of its divisors is an integer number (521170).

2^1980427 is an apocalyptic number.

1980427 is a deficient number, since it is larger than the sum of its proper divisors (104253).

1980427 is a wasteful number, since it uses less digits than its factorization.

1980427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104252.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1980427 is about 1407.2764476108. The cubic root of 1980427 is about 125.5797496326.

The spelling of 1980427 in words is "one million, nine hundred eighty thousand, four hundred twenty-seven".