145221495 has 32 divisors (see below), whose sum is σ = 237227520. Its totient is φ = 75841920.

The previous prime is 145221481. The next prime is 145221547. The reversal of 145221495 is 594122541.

It is not a de Polignac number, because 145221495 - 2⁷ = 145221367 is a prime.

It is a super-2 number, since 2×145221495² = 42178565220070050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229830 + ... + 230460.

It is an arithmetic number, because the mean of its divisors is an integer number (7413360).

Almost surely, 2^145221495 is an apocalyptic number.

145221495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145221495 is a deficient number, since it is larger than the sum of its proper divisors (92006025).

145221495 is a wasteful number, since it uses less digits than its factorization.

145221495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 14400, while the sum is 33.

The square root of 145221495 is about 12050.7881484988. The cubic root of 145221495 is about 525.6261553963.

The spelling of 145221495 in words is "one hundred forty-five million, two hundred twenty-one thousand, four hundred ninety-five".