145372415 has 4 divisors (see below), whose sum is σ = 174446904. Its totient is φ = 116297928.

The previous prime is 145372411. The next prime is 145372427. The reversal of 145372415 is 514273541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 514273541 = 103 ⋅4992947.

It is a cyclic number.

It is not a de Polignac number, because 145372415 - 2² = 145372411 is a prime.

It is a super-2 number, since 2×145372415² = 42266278085864450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145372411) 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, 14537237 + ... + 14537246.

It is an arithmetic number, because the mean of its divisors is an integer number (43611726).

Almost surely, 2^145372415 is an apocalyptic number.

145372415 is a deficient number, since it is larger than the sum of its proper divisors (29074489).

145372415 is an equidigital number, since it uses as much as digits as its factorization.

145372415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29074488.

The product of its digits is 16800, while the sum is 32.

The square root of 145372415 is about 12057.0483535565. The cubic root of 145372415 is about 525.8081762813.

The spelling of 145372415 in words is "one hundred forty-five million, three hundred seventy-two thousand, four hundred fifteen".