145312646 has 8 divisors (see below), whose sum is σ = 229441080. Its totient is φ = 68832288.

The previous prime is 145312633. The next prime is 145312663. The reversal of 145312646 is 646213541.

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

It is a super-2 number, since 2×145312646² = 42231530175042632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911971 + ... + 1912046.

It is an arithmetic number, because the mean of its divisors is an integer number (28680135).

Almost surely, 2^145312646 is an apocalyptic number.

145312646 is a deficient number, since it is larger than the sum of its proper divisors (84128434).

145312646 is a wasteful number, since it uses less digits than its factorization.

145312646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824038.

The product of its digits is 17280, while the sum is 32.

The square root of 145312646 is about 12054.5695070376. The cubic root of 145312646 is about 525.7361054397.

The spelling of 145312646 in words is "one hundred forty-five million, three hundred twelve thousand, six hundred forty-six".