145947557 has 8 divisors (see below), whose sum is σ = 166903296. Its totient is φ = 125018352.

The previous prime is 145947553. The next prime is 145947583. The reversal of 145947557 is 755749541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145947557 - 2² = 145947553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145947551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7043 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (20862912).

Almost surely, 2^145947557 is an apocalyptic number.

It is an amenable number.

145947557 is a deficient number, since it is larger than the sum of its proper divisors (20955739).

145947557 is a wasteful number, since it uses less digits than its factorization.

145947557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13267.

The product of its digits is 882000, while the sum is 47.

The square root of 145947557 is about 12080.8756719039. The cubic root of 145947557 is about 526.5006882751.

The spelling of 145947557 in words is "one hundred forty-five million, nine hundred forty-seven thousand, five hundred fifty-seven".