1519141721 has 2 divisors, whose sum is σ = 1519141722. Its totient is φ = 1519141720.

The previous prime is 1519141693. The next prime is 1519141727. The reversal of 1519141721 is 1271419151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878292496 + 640849225 = 29636^2 + 25315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1519141721 - 2¹⁸ = 1518879577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1519141727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759570860 + 759570861.

It is an arithmetic number, because the mean of its divisors is an integer number (759570861).

Almost surely, 2^1519141721 is an apocalyptic number.

It is an amenable number.

1519141721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1519141721 is an equidigital number, since it uses as much as digits as its factorization.

1519141721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1519141721 is about 38976.1686290482. The cubic root of 1519141721 is about 1149.5629646210.

The spelling of 1519141721 in words is "one billion, five hundred nineteen million, one hundred forty-one thousand, seven hundred twenty-one".