145122978 has 128 divisors (see below), whose sum is σ = 396232704. Its totient is φ = 34214400.

The previous prime is 145122941. The next prime is 145123019. The reversal of 145122978 is 879221541.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438273 + ... + 438603.

It is an arithmetic number, because the mean of its divisors is an integer number (3095568).

Almost surely, 2^145122978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145122978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198116352).

145122978 is an abundant number, since it is smaller than the sum of its proper divisors (251109726).

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

145122978 is a wasteful number, since it uses less digits than its factorization.

145122978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440.

The product of its digits is 40320, while the sum is 39.

The square root of 145122978 is about 12046.6998800501. The cubic root of 145122978 is about 525.5072684366.

The spelling of 145122978 in words is "one hundred forty-five million, one hundred twenty-two thousand, nine hundred seventy-eight".