145137905 has 16 divisors (see below), whose sum is σ = 190695168. Its totient is φ = 105168000.

The previous prime is 145137893. The next prime is 145137919. The reversal of 145137905 is 509731541.

It is not a de Polignac number, because 145137905 - 2⁶ = 145137841 is a prime.

It is a super-2 number, since 2×145137905² = 42130022935578050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10760 + ... + 20150.

It is an arithmetic number, because the mean of its divisors is an integer number (11918448).

Almost surely, 2^145137905 is an apocalyptic number.

It is an amenable number.

145137905 is a deficient number, since it is larger than the sum of its proper divisors (45557263).

145137905 is a wasteful number, since it uses less digits than its factorization.

145137905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9688.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 145137905 is about 12047.3194113877. The cubic root of 145137905 is about 525.5252852895.

The spelling of 145137905 in words is "one hundred forty-five million, one hundred thirty-seven thousand, nine hundred five".