15420453 has 8 divisors (see below), whose sum is σ = 21116448. Its totient is φ = 10002384.

The previous prime is 15420443. The next prime is 15420463. The reversal of 15420453 is 35402451.

15420453 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15420443) and next prime (15420463).

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

It is not a de Polignac number, because 15420453 - 2⁵ = 15420421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420413) 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, 69351 + ... + 69572.

It is an arithmetic number, because the mean of its divisors is an integer number (2639556).

Almost surely, 2^15420453 is an apocalyptic number.

It is an amenable number.

15420453 is a deficient number, since it is larger than the sum of its proper divisors (5695995).

15420453 is a wasteful number, since it uses less digits than its factorization.

15420453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138963.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 15420453 is about 3926.8884628927. Note that the first 3 decimals coincide. The cubic root of 15420453 is about 248.9042873377.

The spelling of 15420453 in words is "fifteen million, four hundred twenty thousand, four hundred fifty-three".