145997470 has 32 divisors (see below), whose sum is σ = 270686592. Its totient is φ = 56663712.

The previous prime is 145997459. The next prime is 145997471. The reversal of 145997470 is 74799541.

It is a super-2 number, since 2×145997470² = 42630522492801800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145997470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145997471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69049 + ... + 71131.

It is an arithmetic number, because the mean of its divisors is an integer number (8458956).

Almost surely, 2^145997470 is an apocalyptic number.

145997470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145997470 is a deficient number, since it is larger than the sum of its proper divisors (124689122).

145997470 is a wasteful number, since it uses less digits than its factorization.

145997470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 145997470 is about 12082.9412809961. The cubic root of 145997470 is about 526.5607012327.

The spelling of 145997470 in words is "one hundred forty-five million, nine hundred ninety-seven thousand, four hundred seventy".