145561437 has 24 divisors (see below), whose sum is σ = 244370880. Its totient is φ = 81766080.

The previous prime is 145561379. The next prime is 145561447. The reversal of 145561437 is 734165541.

145561437 is a `hidden beast` number, since 1 + 4 + 5 + 5 + 614 + 37 = 666.

It is not a de Polignac number, because 145561437 - 2¹⁰ = 145560413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145561447) 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, 15864 + ... + 23297.

It is an arithmetic number, because the mean of its divisors is an integer number (10182120).

Almost surely, 2^145561437 is an apocalyptic number.

It is an amenable number.

145561437 is a deficient number, since it is larger than the sum of its proper divisors (98809443).

145561437 is a wasteful number, since it uses less digits than its factorization.

145561437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39233 (or 39230 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 145561437 is about 12064.8844586262. The cubic root of 145561437 is about 526.0359734345.

The spelling of 145561437 in words is "one hundred forty-five million, five hundred sixty-one thousand, four hundred thirty-seven".