1475045021 has 4 divisors (see below), whose sum is σ = 1475149500. Its totient is φ = 1474940544.

The previous prime is 1475044957. The next prime is 1475045027. The reversal of 1475045021 is 1205405741.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1205405741 = 2953 ⋅408197.

It can be written as a sum of positive squares in 2 ways, for example, as 217562500 + 1257482521 = 14750^2 + 35461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1475045021 - 2⁶ = 1475044957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1475045027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26996 + ... + 60653.

It is an arithmetic number, because the mean of its divisors is an integer number (368787375).

Almost surely, 2^1475045021 is an apocalyptic number.

It is an amenable number.

1475045021 is a deficient number, since it is larger than the sum of its proper divisors (104479).

1475045021 is an equidigital number, since it uses as much as digits as its factorization.

1475045021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104478.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1475045021 is about 38406.3148583667. The cubic root of 1475045021 is about 1138.3306388916.

The spelling of 1475045021 in words is "one billion, four hundred seventy-five million, forty-five thousand, twenty-one".