145421337 has 8 divisors (see below), whose sum is σ = 198020736. Its totient is φ = 94884752.

The previous prime is 145421327. The next prime is 145421351. The reversal of 145421337 is 733124541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145421337 - 2⁴ = 145421321 is a prime.

It is a super-2 number, since 2×145421337² = 42294730509735138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145421317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515538 + ... + 515819.

It is an arithmetic number, because the mean of its divisors is an integer number (24752592).

Almost surely, 2^145421337 is an apocalyptic number.

It is an amenable number.

145421337 is a deficient number, since it is larger than the sum of its proper divisors (52599399).

145421337 is a wasteful number, since it uses less digits than its factorization.

145421337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031407.

The product of its digits is 10080, while the sum is 30.

The square root of 145421337 is about 12059.0769547258. The cubic root of 145421337 is about 525.8671528590.

Adding to 145421337 its reverse (733124541), we get a palindrome (878545878).

It can be divided in two parts, 1454 and 21337, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 145421337 in words is "one hundred forty-five million, four hundred twenty-one thousand, three hundred thirty-seven".