146624561 has 4 divisors (see below), whose sum is σ = 147994992. Its totient is φ = 145254132.

The previous prime is 146624557. The next prime is 146624573. The reversal of 146624561 is 165426641.

146624561 = 120² + 121² + ... + 761².

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 146624561 - 2² = 146624557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146624861) 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, 685055 + ... + 685268.

It is an arithmetic number, because the mean of its divisors is an integer number (36998748).

Almost surely, 2^146624561 is an apocalyptic number.

It is an amenable number.

146624561 is a deficient number, since it is larger than the sum of its proper divisors (1370431).

146624561 is a wasteful number, since it uses less digits than its factorization.

146624561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370430.

The product of its digits is 34560, while the sum is 35.

The square root of 146624561 is about 12108.8629111077. The cubic root of 146624561 is about 527.3135221301.

The spelling of 146624561 in words is "one hundred forty-six million, six hundred twenty-four thousand, five hundred sixty-one".