145137906 has 20 divisors (see below), whose sum is σ = 325216782. Its totient is φ = 48379248.

The previous prime is 145137893. The next prime is 145137919. The reversal of 145137906 is 609731541.

It is an interprime number because it is at equal distance from previous prime (145137893) and next prime (145137919).

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 8037225 = 11709^2 + 2835^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 447795 + ... + 448118.

Almost surely, 2^145137906 is an apocalyptic number.

145137906 is an abundant number, since it is smaller than the sum of its proper divisors (180078876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145137906 is an equidigital number, since it uses as much as digits as its factorization.

145137906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895927 (or 895918 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 145137906 is about 12047.3194528908. The cubic root of 145137906 is about 525.5252864965.

The spelling of 145137906 in words is "one hundred forty-five million, one hundred thirty-seven thousand, nine hundred six".