1404071645 has 4 divisors (see below), whose sum is σ = 1684885980. Its totient is φ = 1123257312.

The previous prime is 1404071621. The next prime is 1404071653. The reversal of 1404071645 is 5461704041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5461704041 = 107 ⋅51043963.

It can be written as a sum of positive squares in 2 ways, for example, as 801909124 + 602162521 = 28318^2 + 24539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1404071645 is a prime.

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, 140407160 + ... + 140407169.

It is an arithmetic number, because the mean of its divisors is an integer number (421221495).

Almost surely, 2^1404071645 is an apocalyptic number.

It is an amenable number.

1404071645 is a deficient number, since it is larger than the sum of its proper divisors (280814335).

1404071645 is an equidigital number, since it uses as much as digits as its factorization.

1404071645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280814334.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1404071645 is about 37470.9440099926. The cubic root of 1404071645 is about 1119.7723934279.

Adding to 1404071645 its reverse (5461704041), we get a palindrome (6865775686).

The spelling of 1404071645 in words is "one billion, four hundred four million, seventy-one thousand, six hundred forty-five".