145521123402 has 32 divisors (see below), whose sum is σ = 296620536960. Its totient is φ = 47586139200.

The previous prime is 145521123389. The next prime is 145521123427. The reversal of 145521123402 is 204321125541.

It is a super-2 number, since 2×145521123402² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145521123402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035478 + ... + 1167585.

It is an arithmetic number, because the mean of its divisors is an integer number (9269391780).

Almost surely, 2^145521123402 is an apocalyptic number.

145521123402 is an abundant number, since it is smaller than the sum of its proper divisors (151099413558).

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

145521123402 is a wasteful number, since it uses less digits than its factorization.

145521123402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203278.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 145521123402 its reverse (204321125541), we get a palindrome (349842248943).

The spelling of 145521123402 in words is "one hundred forty-five billion, five hundred twenty-one million, one hundred twenty-three thousand, four hundred two".