145298772 has 60 divisors (see below), whose sum is σ = 381732736. Its totient is φ = 48191760.

The previous prime is 145298759. The next prime is 145298773. The reversal of 145298772 is 277892541.

It is a happy number.

It is a super-2 number, since 2×145298772² = 42223466289415968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145298773) 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 19 ways as a sum of consecutive naturals, for example, 71247 + ... + 73257.

Almost surely, 2^145298772 is an apocalyptic number.

145298772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145298772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190866368).

145298772 is an abundant number, since it is smaller than the sum of its proper divisors (236433964).

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

145298772 is a wasteful number, since it uses less digits than its factorization.

145298772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2239 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 145298772 is about 12053.9940268776. The cubic root of 145298772 is about 525.7193730238.

It can be divided in two parts, 145298 and 772, that added together give a triangular number (146070 = T₅₄₀).

The spelling of 145298772 in words is "one hundred forty-five million, two hundred ninety-eight thousand, seven hundred seventy-two".