1494846721 has 4 divisors (see below), whose sum is σ = 1503198000. Its totient is φ = 1486495444.

The previous prime is 1494846713. The next prime is 1494846767. The reversal of 1494846721 is 1276484941.

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: 1276484941 = 37 ⋅34499593.

It is a cyclic number.

It is not a de Polignac number, because 1494846721 - 2³ = 1494846713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1494846781) 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, 4175371 + ... + 4175728.

It is an arithmetic number, because the mean of its divisors is an integer number (375799500).

Almost surely, 2^1494846721 is an apocalyptic number.

It is an amenable number.

1494846721 is a deficient number, since it is larger than the sum of its proper divisors (8351279).

1494846721 is an equidigital number, since it uses as much as digits as its factorization.

1494846721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351278.

The product of its digits is 387072, while the sum is 46.

The square root of 1494846721 is about 38663.2476778659. The cubic root of 1494846721 is about 1143.4018425082.

The spelling of 1494846721 in words is "one billion, four hundred ninety-four million, eight hundred forty-six thousand, seven hundred twenty-one".