1979145 has 48 divisors (see below), whose sum is σ = 4023552. Its totient is φ = 881280.

The previous prime is 1979143. The next prime is 1979147. The reversal of 1979145 is 5419791.

It is an interprime number because it is at equal distance from previous prime (1979143) and next prime (1979147).

It is not a de Polignac number, because 1979145 - 2¹ = 1979143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1979141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19164 + ... + 19266.

It is an arithmetic number, because the mean of its divisors is an integer number (83824).

2^1979145 is an apocalyptic number.

1979145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979145 is an abundant number, since it is smaller than the sum of its proper divisors (2044407).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1979145 is a wasteful number, since it uses less digits than its factorization.

1979145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 179 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 1979145 is about 1406.8208841214. The cubic root of 1979145 is about 125.5526463883.

The spelling of 1979145 in words is "one million, nine hundred seventy-nine thousand, one hundred forty-five".