151441421 has 4 divisors (see below), whose sum is σ = 153143100. Its totient is φ = 149739744.

The previous prime is 151441387. The next prime is 151441427. The reversal of 151441421 is 124144151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124144151 = 127 ⋅977513.

It can be written as a sum of positive squares in 2 ways, for example, as 69538921 + 81902500 = 8339^2 + 9050^2 .

It is a cyclic number.

It is not a de Polignac number, because 151441421 - 2²⁶ = 84332557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151441427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850706 + ... + 850883.

It is an arithmetic number, because the mean of its divisors is an integer number (38285775).

Almost surely, 2^151441421 is an apocalyptic number.

It is an amenable number.

151441421 is a deficient number, since it is larger than the sum of its proper divisors (1701679).

151441421 is an equidigital number, since it uses as much as digits as its factorization.

151441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701678.

The product of its digits is 640, while the sum is 23.

The square root of 151441421 is about 12306.1537858098. The cubic root of 151441421 is about 533.0257934851.

Adding to 151441421 its reverse (124144151), we get a palindrome (275585572).

The spelling of 151441421 in words is "one hundred fifty-one million, four hundred forty-one thousand, four hundred twenty-one".