1541442401921 has 2 divisors, whose sum is σ = 1541442401922. Its totient is φ = 1541442401920.

The previous prime is 1541442401887. The next prime is 1541442401927. The reversal of 1541442401921 is 1291042441451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863479543696 + 677962858225 = 929236^2 + 823385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1541442401921 - 2³⁸ = 1266564494977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1541442401927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770721200960 + 770721200961.

It is an arithmetic number, because the mean of its divisors is an integer number (770721200961).

Almost surely, 2^{1541442401921} is an apocalyptic number.

It is an amenable number.

1541442401921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541442401921 is an equidigital number, since it uses as much as digits as its factorization.

1541442401921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 1541442401921 in words is "one trillion, five hundred forty-one billion, four hundred forty-two million, four hundred one thousand, nine hundred twenty-one".