145425661 has 4 divisors (see below), whose sum is σ = 148519872. Its totient is φ = 142331452.

The previous prime is 145425653. The next prime is 145425673. The reversal of 145425661 is 166524541.

145425661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145425661 - 2³ = 145425653 is a prime.

It is a super-2 number, since 2×145425661² = 42297245754573842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145425611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547035 + ... + 1547128.

It is an arithmetic number, because the mean of its divisors is an integer number (37129968).

Almost surely, 2^145425661 is an apocalyptic number.

It is an amenable number.

145425661 is a deficient number, since it is larger than the sum of its proper divisors (3094211).

145425661 is an equidigital number, since it uses as much as digits as its factorization.

145425661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094210.

The product of its digits is 28800, while the sum is 34.

The square root of 145425661 is about 12059.2562374302. The cubic root of 145425661 is about 525.8723649025.

The spelling of 145425661 in words is "one hundred forty-five million, four hundred twenty-five thousand, six hundred sixty-one".