1075647421 has 2 divisors, whose sum is σ = 1075647422. Its totient is φ = 1075647420.

The previous prime is 1075647407. The next prime is 1075647427. The reversal of 1075647421 is 1247465701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706815396 + 368832025 = 26586^2 + 19205^2 .

It is an emirp because it is prime and its reverse (1247465701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1075647421 - 2⁵ = 1075647389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1075647427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537823710 + 537823711.

It is an arithmetic number, because the mean of its divisors is an integer number (537823711).

Almost surely, 2^1075647421 is an apocalyptic number.

It is an amenable number.

1075647421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075647421 is an equidigital number, since it uses as much as digits as its factorization.

1075647421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1075647421 is about 32797.0642131274. The cubic root of 1075647421 is about 1024.6054149648.

The spelling of 1075647421 in words is "one billion, seventy-five million, six hundred forty-seven thousand, four hundred twenty-one".