145371972 has 12 divisors (see below), whose sum is σ = 339201296. Its totient is φ = 48457320.

The previous prime is 145371971. The next prime is 145371973. The reversal of 145371972 is 279173541.

It is an interprime number because it is at equal distance from previous prime (145371971) and next prime (145371973).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×145371972² = 42266020486337568, 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 145371972.

It is not an unprimeable number, because it can be changed into a prime (145371971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6057154 + ... + 6057177.

Almost surely, 2^145371972 is an apocalyptic number.

145371972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145371972 is an abundant number, since it is smaller than the sum of its proper divisors (193829324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145371972 is a wasteful number, since it uses less digits than its factorization.

145371972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12114338 (or 12114336 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 145371972 is about 12057.0299825455. The cubic root of 145371972 is about 525.8076421744.

The spelling of 145371972 in words is "one hundred forty-five million, three hundred seventy-one thousand, nine hundred seventy-two".