151402421 has 2 divisors, whose sum is σ = 151402422. Its totient is φ = 151402420.

The previous prime is 151402373. The next prime is 151402457. The reversal of 151402421 is 124204151.

It is a happy number.

151402421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 972196 = 12265^2 + 986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151402421 is a prime.

It is a super-2 number, since 2×151402421² = 45845386169322482, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 151402393 and 151402402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151402021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75701210 + 75701211.

It is an arithmetic number, because the mean of its divisors is an integer number (75701211).

Almost surely, 2^151402421 is an apocalyptic number.

It is an amenable number.

151402421 is a deficient number, since it is larger than the sum of its proper divisors (1).

151402421 is an equidigital number, since it uses as much as digits as its factorization.

151402421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 151402421 is about 12304.5691107003. The cubic root of 151402421 is about 532.9800336779.

Adding to 151402421 its reverse (124204151), we get a palindrome (275606572).

The spelling of 151402421 in words is "one hundred fifty-one million, four hundred two thousand, four hundred twenty-one".