145377477 has 32 divisors (see below), whose sum is σ = 252806400. Its totient is φ = 80823744.

The previous prime is 145377467. The next prime is 145377499. The reversal of 145377477 is 774773541.

It is a happy number.

145377477 is a `hidden beast` number, since 145 + 37 + 7 + 477 = 666.

It is not a de Polignac number, because 145377477 - 2¹² = 145373381 is a prime.

It is a super-2 number, since 2×145377477² = 42269221637771058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145377437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3402 + ... + 17387.

It is an arithmetic number, because the mean of its divisors is an integer number (7900200).

Almost surely, 2^145377477 is an apocalyptic number.

It is an amenable number.

145377477 is a deficient number, since it is larger than the sum of its proper divisors (107428923).

145377477 is a wasteful number, since it uses less digits than its factorization.

145377477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20842 (or 20836 counting only the distinct ones).

The product of its digits is 576240, while the sum is 45.

The square root of 145377477 is about 12057.2582704361. The cubic root of 145377477 is about 525.8142792505.

The spelling of 145377477 in words is "one hundred forty-five million, three hundred seventy-seven thousand, four hundred seventy-seven".