1497120421 has 2 divisors, whose sum is σ = 1497120422. Its totient is φ = 1497120420.

The previous prime is 1497120403. The next prime is 1497120437. The reversal of 1497120421 is 1240217941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1445064196 + 52056225 = 38014^2 + 7215^2 .

It is an emirp because it is prime and its reverse (1240217941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1497120421 - 2¹¹ = 1497118373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1497120451) 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, 748560210 + 748560211.

It is an arithmetic number, because the mean of its divisors is an integer number (748560211).

Almost surely, 2^1497120421 is an apocalyptic number.

It is an amenable number.

1497120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497120421 is an equidigital number, since it uses as much as digits as its factorization.

1497120421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1497120421 is about 38692.6403984013. The cubic root of 1497120421 is about 1143.9812632940.

The spelling of 1497120421 in words is "one billion, four hundred ninety-seven million, one hundred twenty thousand, four hundred twenty-one".