145240477 has 4 divisors (see below), whose sum is σ = 147702240. Its totient is φ = 142778716.

The previous prime is 145240471. The next prime is 145240489. The reversal of 145240477 is 774042541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774042541 = 25873 ⋅29917.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145240477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145240471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230793 + ... + 1230910.

It is an arithmetic number, because the mean of its divisors is an integer number (36925560).

Almost surely, 2^145240477 is an apocalyptic number.

It is an amenable number.

145240477 is a deficient number, since it is larger than the sum of its proper divisors (2461763).

145240477 is an equidigital number, since it uses as much as digits as its factorization.

145240477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461762.

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 145240477 is about 12051.5757061058. The cubic root of 145240477 is about 525.6490560489.

The spelling of 145240477 in words is "one hundred forty-five million, two hundred forty thousand, four hundred seventy-seven".