1492730221 has 2 divisors, whose sum is σ = 1492730222. Its totient is φ = 1492730220.

The previous prime is 1492730219. The next prime is 1492730303. The reversal of 1492730221 is 1220372941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197921321 + 294808900 = 34611^2 + 17170^2 .

It is an emirp because it is prime and its reverse (1220372941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1492730221 - 2¹ = 1492730219 is a prime.

Together with 1492730219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1492739221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746365110 + 746365111.

It is an arithmetic number, because the mean of its divisors is an integer number (746365111).

Almost surely, 2^1492730221 is an apocalyptic number.

It is an amenable number.

1492730221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1492730221 is an equidigital number, since it uses as much as digits as its factorization.

1492730221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1492730221 is about 38635.8670279314. The cubic root of 1492730221 is about 1142.8619537022.

The spelling of 1492730221 in words is "one billion, four hundred ninety-two million, seven hundred thirty thousand, two hundred twenty-one".