1495122221 has 2 divisors, whose sum is σ = 1495122222. Its totient is φ = 1495122220.

The previous prime is 1495122203. The next prime is 1495122259. The reversal of 1495122221 is 1222215941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1452676996 + 42445225 = 38114^2 + 6515^2 .

It is an emirp because it is prime and its reverse (1222215941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1495122221 - 2¹⁴ = 1495105837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1495125221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747561110 + 747561111.

It is an arithmetic number, because the mean of its divisors is an integer number (747561111).

Almost surely, 2^1495122221 is an apocalyptic number.

It is an amenable number.

1495122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1495122221 is an equidigital number, since it uses as much as digits as its factorization.

1495122221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 1495122221 is about 38666.8103287561. The cubic root of 1495122221 is about 1143.4720811160.

The spelling of 1495122221 in words is "one billion, four hundred ninety-five million, one hundred twenty-two thousand, two hundred twenty-one".