145193457 has 16 divisors (see below), whose sum is σ = 203563008. Its totient is φ = 91874640.

The previous prime is 145193441. The next prime is 145193471. The reversal of 145193457 is 754391541.

It is not a de Polignac number, because 145193457 - 2⁴ = 145193441 is a prime.

It is a super-2 number, since 2×145193457² = 42162279911221698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145113457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008 + ... + 17070.

It is an arithmetic number, because the mean of its divisors is an integer number (12722688).

Almost surely, 2^145193457 is an apocalyptic number.

It is an amenable number.

145193457 is a deficient number, since it is larger than the sum of its proper divisors (58369551).

145193457 is a wasteful number, since it uses less digits than its factorization.

145193457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16220.

The product of its digits is 75600, while the sum is 39.

The square root of 145193457 is about 12049.6247659419. The cubic root of 145193457 is about 525.5923255681.

The spelling of 145193457 in words is "one hundred forty-five million, one hundred ninety-three thousand, four hundred fifty-seven".