145461376421 has 2 divisors, whose sum is σ = 145461376422. Its totient is φ = 145461376420.

The previous prime is 145461376351. The next prime is 145461376427. The reversal of 145461376421 is 124673164541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119705620225 + 25755756196 = 345985^2 + 160486^2 .

It is a cyclic number.

It is not a de Polignac number, because 145461376421 - 2¹⁸ = 145461114277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145461376427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72730688210 + 72730688211.

It is an arithmetic number, because the mean of its divisors is an integer number (72730688211).

Almost surely, 2^145461376421 is an apocalyptic number.

It is an amenable number.

145461376421 is a deficient number, since it is larger than the sum of its proper divisors (1).

145461376421 is an equidigital number, since it uses as much as digits as its factorization.

145461376421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The spelling of 145461376421 in words is "one hundred forty-five billion, four hundred sixty-one million, three hundred seventy-six thousand, four hundred twenty-one".