145151972 has 48 divisors (see below), whose sum is σ = 299230848. Its totient is φ = 60314880.

The previous prime is 145151971. The next prime is 145151987. The reversal of 145151972 is 279151541.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (145151971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260318 + ... + 260874.

It is an arithmetic number, because the mean of its divisors is an integer number (6233976).

Almost surely, 2^145151972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145151972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149615424).

145151972 is an abundant number, since it is smaller than the sum of its proper divisors (154078876).

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

145151972 is a wasteful number, since it uses less digits than its factorization.

145151972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 834 counting only the distinct ones).

The product of its digits is 12600, while the sum is 35.

The square root of 145151972 is about 12047.9032200628. The cubic root of 145151972 is about 525.5422629940.

The spelling of 145151972 in words is "one hundred forty-five million, one hundred fifty-one thousand, nine hundred seventy-two".