145461556 has 18 divisors (see below), whose sum is σ = 258445698. Its totient is φ = 71636400.

The previous prime is 145461539. The next prime is 145461557. The reversal of 145461556 is 655164541.

It can be written as a sum of positive squares in only one way, i.e., 145443600 + 17956 = 12060^2 + 134^2 .

It is a super-2 number, since 2×145461556² = 42318128547882272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145461557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13906 + ... + 22006.

Almost surely, 2^145461556 is an apocalyptic number.

It is an amenable number.

145461556 is a deficient number, since it is larger than the sum of its proper divisors (112984142).

145461556 is an equidigital number, since it uses as much as digits as its factorization.

145461556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8239 (or 8170 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 145461556 is about 12060.7444214692. The cubic root of 145461556 is about 525.9156278672.

The spelling of 145461556 in words is "one hundred forty-five million, four hundred sixty-one thousand, five hundred fifty-six".