1561078 has 8 divisors (see below), whose sum is σ = 2464920. Its totient is φ = 739440.

The previous prime is 1561069. The next prime is 1561111. The reversal of 1561078 is 8701651.

It is a happy number.

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

It is a congruent number.

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, 20503 + ... + 20578.

It is an arithmetic number, because the mean of its divisors is an integer number (308115).

2^1561078 is an apocalyptic number.

1561078 is a deficient number, since it is larger than the sum of its proper divisors (903842).

1561078 is a wasteful number, since it uses less digits than its factorization.

1561078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41102.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1561078 is about 1249.4310705277. The cubic root of 1561078 is about 116.0045083464.

It can be divided in two parts, 15610 and 78, that multiplied together give a triangular number (1217580 = T₁₅₆₀).

The spelling of 1561078 in words is "one million, five hundred sixty-one thousand, seventy-eight".