1457004721 has 8 divisors (see below), whose sum is σ = 1540450080. Its totient is φ = 1374235488.

The previous prime is 1457004709. The next prime is 1457004739. The reversal of 1457004721 is 1274007541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1457004721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1457004751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164596 + ... + 173221.

It is an arithmetic number, because the mean of its divisors is an integer number (192556260).

Almost surely, 2^1457004721 is an apocalyptic number.

It is an amenable number.

1457004721 is a deficient number, since it is larger than the sum of its proper divisors (83445359).

1457004721 is a wasteful number, since it uses less digits than its factorization.

1457004721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338063.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 1457004721 is about 38170.7312086106. The cubic root of 1457004721 is about 1133.6708670442.

The spelling of 1457004721 in words is "one billion, four hundred fifty-seven million, four thousand, seven hundred twenty-one".