145405457 has 2 divisors, whose sum is σ = 145405458. Its totient is φ = 145405456.

The previous prime is 145405367. The next prime is 145405487. The reversal of 145405457 is 754504541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115111441 + 30294016 = 10729^2 + 5504^2 .

It is a cyclic number.

It is not a de Polignac number, because 145405457 - 2¹⁰ = 145404433 is a prime.

It is a super-2 number, since 2×145405457² = 42285493850757698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145405487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72702728 + 72702729.

It is an arithmetic number, because the mean of its divisors is an integer number (72702729).

Almost surely, 2^145405457 is an apocalyptic number.

It is an amenable number.

145405457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145405457 is an equidigital number, since it uses as much as digits as its factorization.

145405457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 35.

The square root of 145405457 is about 12058.4185115628. The cubic root of 145405457 is about 525.8480106099.

Adding to 145405457 its reverse (754504541), we get a palindrome (899909998).

The spelling of 145405457 in words is "one hundred forty-five million, four hundred five thousand, four hundred fifty-seven".