1961578 has 8 divisors (see below), whose sum is σ = 3070368. Its totient is φ = 938124.

The previous prime is 1961551. The next prime is 1961581. The reversal of 1961578 is 8751691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21276 + ... + 21367.

It is an arithmetic number, because the mean of its divisors is an integer number (383796).

2^1961578 is an apocalyptic number.

1961578 is a deficient number, since it is larger than the sum of its proper divisors (1108790).

1961578 is a wasteful number, since it uses less digits than its factorization.

1961578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42668.

The product of its digits is 15120, while the sum is 37.

The square root of 1961578 is about 1400.5634580411. The cubic root of 1961578 is about 125.1800711372.

The spelling of 1961578 in words is "one million, nine hundred sixty-one thousand, five hundred seventy-eight".