145497856 has 72 divisors (see below), whose sum is σ = 338895200. Its totient is φ = 62318592.

The previous prime is 145497829. The next prime is 145497881. The reversal of 145497856 is 658794541.

It is a happy number.

It is a super-2 number, since 2×145497856² = 42339252201193472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86980 + ... + 88636.

Almost surely, 2^145497856 is an apocalyptic number.

145497856 is a gapful number since it is divisible by the number (16) 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 145497856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169447600).

145497856 is an abundant number, since it is smaller than the sum of its proper divisors (193397344).

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

145497856 is an frugal number, since it uses more digits than its factorization.

145497856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 1666 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 145497856 is about 12062.2492098282. The cubic root of 145497856 is about 525.9593717264.

The spelling of 145497856 in words is "one hundred forty-five million, four hundred ninety-seven thousand, eight hundred fifty-six".