1404361561 has 8 divisors (see below), whose sum is σ = 1439117064. Its totient is φ = 1369630080.

The previous prime is 1404361547. The next prime is 1404361571. The reversal of 1404361561 is 1651634041.

It can be written as a sum of positive squares in 4 ways, for example, as 435600 + 1403925961 = 660^2 + 37469^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1404361561 - 2²³ = 1395972953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1404361501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190435 + ... + 197671.

It is an arithmetic number, because the mean of its divisors is an integer number (179889633).

Almost surely, 2^1404361561 is an apocalyptic number.

It is an amenable number.

1404361561 is a deficient number, since it is larger than the sum of its proper divisors (34755503).

1404361561 is an equidigital number, since it uses as much as digits as its factorization.

1404361561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1404361561 is about 37474.8123544335. The cubic root of 1404361561 is about 1119.8494591989.

The spelling of 1404361561 in words is "one billion, four hundred four million, three hundred sixty-one thousand, five hundred sixty-one".