1457906981 has 2 divisors, whose sum is σ = 1457906982. Its totient is φ = 1457906980.

The previous prime is 1457906977. The next prime is 1457906999. The reversal of 1457906981 is 1896097541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1250258881 + 207648100 = 35359^2 + 14410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1457906981 - 2² = 1457906977 is a prime.

It is a super-2 number, since 2×1457906981² = 4250985530497068722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1457906951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728953490 + 728953491.

It is an arithmetic number, because the mean of its divisors is an integer number (728953491).

Almost surely, 2^1457906981 is an apocalyptic number.

It is an amenable number.

1457906981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457906981 is an equidigital number, since it uses as much as digits as its factorization.

1457906981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 1457906981 is about 38182.5481208366. The cubic root of 1457906981 is about 1133.9048298666.

The spelling of 1457906981 in words is "one billion, four hundred fifty-seven million, nine hundred six thousand, nine hundred eighty-one".