145951491 has 32 divisors (see below), whose sum is σ = 232934400. Its totient is φ = 79478784.

The previous prime is 145951469. The next prime is 145951501. The reversal of 145951491 is 194159541.

It is not a de Polignac number, because 145951491 - 2⁵ = 145951459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145951411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216531 + ... + 217203.

It is an arithmetic number, because the mean of its divisors is an integer number (7279200).

Almost surely, 2^145951491 is an apocalyptic number.

145951491 is a deficient number, since it is larger than the sum of its proper divisors (86982909).

145951491 is a wasteful number, since it uses less digits than its factorization.

145951491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

The product of its digits is 32400, while the sum is 39.

The square root of 145951491 is about 12081.0384901299. The cubic root of 145951491 is about 526.5054188216.

The spelling of 145951491 in words is "one hundred forty-five million, nine hundred fifty-one thousand, four hundred ninety-one".