145621136 has 40 divisors (see below), whose sum is σ = 293505024. Its totient is φ = 69914880.

The previous prime is 145621123. The next prime is 145621139. The reversal of 145621136 is 631126541.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 145621099 and 145621108.

It is not an unprimeable number, because it can be changed into a prime (145621139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66881 + ... + 69023.

Almost surely, 2^145621136 is an apocalyptic number.

145621136 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 145621136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146752512).

145621136 is an abundant number, since it is smaller than the sum of its proper divisors (147883888).

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

145621136 is a wasteful number, since it uses less digits than its factorization.

145621136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319 (or 2313 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 145621136 is about 12067.3582858884. The cubic root of 145621136 is about 526.1078778482.

Adding to 145621136 its reverse (631126541), we get a palindrome (776747677).

The spelling of 145621136 in words is "one hundred forty-five million, six hundred twenty-one thousand, one hundred thirty-six".