145420502 has 4 divisors (see below), whose sum is σ = 218130756. Its totient is φ = 72710250.

The previous prime is 145420493. The next prime is 145420553. The reversal of 145420502 is 205024541.

It is a happy number.

145420502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205024541 = 359 ⋅571099.

It is a super-2 number, since 2×145420502² = 42294244803864008, 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 as a sum of consecutive naturals, namely, 36355124 + ... + 36355127.

It is an arithmetic number, because the mean of its divisors is an integer number (54532689).

Almost surely, 2^145420502 is an apocalyptic number.

145420502 is a deficient number, since it is larger than the sum of its proper divisors (72710254).

145420502 is an equidigital number, since it uses as much as digits as its factorization.

145420502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72710253.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 145420502 is about 12059.0423334525. The cubic root of 145420502 is about 525.8661463585.

The spelling of 145420502 in words is "one hundred forty-five million, four hundred twenty thousand, five hundred two".