1054751981 has 2 divisors, whose sum is σ = 1054751982. Its totient is φ = 1054751980.

The previous prime is 1054751977. The next prime is 1054751983. The reversal of 1054751981 is 1891574501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1039030756 + 15721225 = 32234^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1054751981 - 2² = 1054751977 is a prime.

It is a super-2 number, since 2×1054751981² = 2225003482846848722, which contains 22 as substring.

Together with 1054751983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1054751983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527375990 + 527375991.

It is an arithmetic number, because the mean of its divisors is an integer number (527375991).

Almost surely, 2^1054751981 is an apocalyptic number.

It is an amenable number.

1054751981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1054751981 is an equidigital number, since it uses as much as digits as its factorization.

1054751981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 41.

The square root of 1054751981 is about 32476.9453766822. The cubic root of 1054751981 is about 1017.9273499026.

The spelling of 1054751981 in words is "one billion, fifty-four million, seven hundred fifty-one thousand, nine hundred eighty-one".