145249240 has 32 divisors (see below), whose sum is σ = 328050000. Its totient is φ = 57879424.

The previous prime is 145249231. The next prime is 145249249. The reversal of 145249240 is 42942541.

It is an interprime number because it is at equal distance from previous prime (145249231) and next prime (145249249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145249249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4011 + ... + 17509.

Almost surely, 2^145249240 is an apocalyptic number.

145249240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145249240 is an abundant number, since it is smaller than the sum of its proper divisors (182800760).

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

145249240 is a wasteful number, since it uses less digits than its factorization.

145249240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13779 (or 13775 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 145249240 is about 12051.9392630398. The cubic root of 145249240 is about 525.6596274133.

The spelling of 145249240 in words is "one hundred forty-five million, two hundred forty-nine thousand, two hundred forty".