145402233421 has 8 divisors (see below), whose sum is σ = 146361497888. Its totient is φ = 144445518000.

The previous prime is 145402233419. The next prime is 145402233467. The reversal of 145402233421 is 124332204541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145402233421 - 2¹ = 145402233419 is a prime.

It is a super-2 number, since 2×145402233421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (175402233421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522735 + ... + 751036.

It is an arithmetic number, because the mean of its divisors is an integer number (18295187236).

Almost surely, 2^145402233421 is an apocalyptic number.

It is an amenable number.

145402233421 is a deficient number, since it is larger than the sum of its proper divisors (959264467).

145402233421 is a wasteful number, since it uses less digits than its factorization.

145402233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274523.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 145402233421 its reverse (124332204541), we get a palindrome (269734437962).

The spelling of 145402233421 in words is "one hundred forty-five billion, four hundred two million, two hundred thirty-three thousand, four hundred twenty-one".