1455021641 has 4 divisors (see below), whose sum is σ = 1457682192. Its totient is φ = 1452361092.

The previous prime is 1455021613. The next prime is 1455021643. The reversal of 1455021641 is 1461205541.

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.

It is a cyclic number.

It is not a de Polignac number, because 1455021641 - 2³⁰ = 381279817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1455021643) 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, 1329455 + ... + 1330548.

It is an arithmetic number, because the mean of its divisors is an integer number (364420548).

Almost surely, 2^1455021641 is an apocalyptic number.

It is an amenable number.

1455021641 is a deficient number, since it is larger than the sum of its proper divisors (2660551).

1455021641 is an equidigital number, since it uses as much as digits as its factorization.

1455021641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660550.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1455021641 is about 38144.7459160498. The cubic root of 1455021641 is about 1133.1562997891.

The spelling of 1455021641 in words is "one billion, four hundred fifty-five million, twenty-one thousand, six hundred forty-one".