146725421 has 2 divisors, whose sum is σ = 146725422. Its totient is φ = 146725420.

The previous prime is 146725373. The next prime is 146725463. The reversal of 146725421 is 124527641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91891396 + 54834025 = 9586^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 146725421 - 2¹⁴ = 146709037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146725021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73362710 + 73362711.

It is an arithmetic number, because the mean of its divisors is an integer number (73362711).

Almost surely, 2^146725421 is an apocalyptic number.

It is an amenable number.

146725421 is a deficient number, since it is larger than the sum of its proper divisors (1).

146725421 is an equidigital number, since it uses as much as digits as its factorization.

146725421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 146725421 is about 12113.0269132038. The cubic root of 146725421 is about 527.4344037687.

The spelling of 146725421 in words is "one hundred forty-six million, seven hundred twenty-five thousand, four hundred twenty-one".