145542397 has 24 divisors (see below), whose sum is σ = 198912672. Its totient is φ = 104680800.

The previous prime is 145542391. The next prime is 145542437. The reversal of 145542397 is 793245541.

It is a happy number.

It is not a de Polignac number, because 145542397 - 2⁷ = 145542269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145542391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3379 + ... + 17392.

It is an arithmetic number, because the mean of its divisors is an integer number (8288028).

Almost surely, 2^145542397 is an apocalyptic number.

It is an amenable number.

145542397 is a deficient number, since it is larger than the sum of its proper divisors (53370275).

145542397 is a wasteful number, since it uses less digits than its factorization.

145542397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20809 (or 20802 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 145542397 is about 12064.0953660024. The cubic root of 145542397 is about 526.0130365865.

The spelling of 145542397 in words is "one hundred forty-five million, five hundred forty-two thousand, three hundred ninety-seven".