145420553 has 2 divisors, whose sum is σ = 145420554. Its totient is φ = 145420552.

The previous prime is 145420493. The next prime is 145420589. The reversal of 145420553 is 355024541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134838544 + 10582009 = 11612^2 + 3253^2 .

It is a cyclic number.

It is not a de Polignac number, because 145420553 - 2¹⁰ = 145419529 is a prime.

It is a super-2 number, since 2×145420553² = 42294274469651618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145422553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72710276 + 72710277.

It is an arithmetic number, because the mean of its divisors is an integer number (72710277).

Almost surely, 2^145420553 is an apocalyptic number.

It is an amenable number.

145420553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145420553 is an equidigital number, since it uses as much as digits as its factorization.

145420553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 145420553 is about 12059.0444480481. The cubic root of 145420553 is about 525.8662078335.

The spelling of 145420553 in words is "one hundred forty-five million, four hundred twenty thousand, five hundred fifty-three".