145253724 has 144 divisors (see below), whose sum is σ = 440444928. Its totient is φ = 36432000.

The previous prime is 145253711. The next prime is 145253743. The reversal of 145253724 is 427352541.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314854 + ... + 315314.

Almost surely, 2^145253724 is an apocalyptic number.

145253724 is a gapful number since it is divisible by the number (14) 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 145253724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220222464).

145253724 is an abundant number, since it is smaller than the sum of its proper divisors (295191204).

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

145253724 is a wasteful number, since it uses less digits than its factorization.

145253724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 515 counting only the distinct ones).

The product of its digits is 33600, while the sum is 33.

The square root of 145253724 is about 12052.1252897570. The cubic root of 145253724 is about 525.6650365834.

The spelling of 145253724 in words is "one hundred forty-five million, two hundred fifty-three thousand, seven hundred twenty-four".