1465057021 has 4 divisors (see below), whose sum is σ = 1467471232. Its totient is φ = 1462642812.

The previous prime is 1465057019. The next prime is 1465057037. The reversal of 1465057021 is 1207505641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1207505641 = 1259 ⋅959099.

It is a cyclic number.

It is not a de Polignac number, because 1465057021 - 2¹ = 1465057019 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 (1465057001) 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, 1206195 + ... + 1207408.

It is an arithmetic number, because the mean of its divisors is an integer number (366867808).

Almost surely, 2^1465057021 is an apocalyptic number.

It is an amenable number.

1465057021 is a deficient number, since it is larger than the sum of its proper divisors (2414211).

1465057021 is an equidigital number, since it uses as much as digits as its factorization.

1465057021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414210.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1465057021 is about 38276.0632902601. The cubic root of 1465057021 is about 1135.7554845211.

The spelling of 1465057021 in words is "one billion, four hundred sixty-five million, fifty-seven thousand, twenty-one".